Crop nutritional composition comprising magnesium and iron

Abstract

The present invention relates to a crop nutritional composition in the form of water dispersible granules comprising a homogeneous mixture of one or more water insoluble iron salts, iron complexes or iron derivatives, accounting for 1%-50% w / w of the total amount of the composition; one or more water-insoluble magnesium salts, magnesium complexes or magnesium derivatives, accounting for 5-80% w / w of the total amount of the composition; and at least one agrochemically acceptable excipient. Wherein the content of the element iron accounts for 0.01%-50% w / w of the total amount of the composition; wherein the content of the element magnesium accounts for 0.1-50% w / w of the total amount of the composition; wherein the composition comprises particles having a size ranging from 0.1 [mu] m to 30 [mu] m. The invention relates to a method for preparing the crop nutritional composition and a method for treating a plant, a seed, a crop, plant propagation material, a locus, a plant part or soil by using the crop nutritional composition.

Description

Field of the Invention

[0001] The present invention relates to a crop nutrient composition in the form of a water-dispersible granule, which comprises a homogeneous mixture of an effective amount of one or more water-insoluble magnesium salts, magnesium complexes or magnesium derivatives, and one or more water-insoluble iron salts, iron complexes or iron derivatives, and at least one agrochemically acceptable excipient. The particle size range of the water-dispersible granule composition of the present invention is from 0.1 micrometer to 30 micrometers.

[0002] The present invention also relates to a composition in the form of a water-dispersible granule, which comprises a homogeneous mixture of one or more water-insoluble magnesium salts, magnesium complexes or magnesium derivatives accounting for 5%-80% w / w of the total composition, one or more water-insoluble iron salts, iron complexes or iron derivatives accounting for 1%-50% w / w of the total composition and at least one agrochemically acceptable excipient; wherein elemental iron accounts for 0.01% to 50% of the total composition by weight, elemental magnesium accounts for 0.1% to 50% of the total composition by weight, and wherein the composition comprises particles with a size range of 0.1 micrometer - 30 micrometers.

[0003] The present invention relates to a method for improving plant health or enhancing plant nutrient uptake or increasing plant yield by treating at least one of plants, plant propagation materials, sites, plant parts, seeds, seedlings or surrounding soil with the composition in the form of a water-dispersible granule of the present invention. Background of the Invention

[0005] In describing the embodiments of the present invention, specific terms are chosen for clarity. However, the present invention is not limited to the specific terms chosen, and it should be understood that each specific term encompasses all technical equivalents that operate in a similar manner to achieve a similar purpose.

[0006] Nutrition is a key factor in crop growth and development. Insufficient plant nutrition supply can lead to poor growth and physiological development, and thus be more vulnerable to pests and diseases. Other agriculture-related problems include environmental conditions such as drought, biotic and abiotic stresses, soil infertility or soil nutrient depletion, which can all lead to a decline in the yield and quality of agricultural products. Therefore, how to provide sufficient and balanced nutrition to enable plants to maximize nutrient absorption while protecting crops remains a huge challenge. Optimizing soil conditions and managing the use of crop nutrients have always been the urgent needs of farmers to improve crop nutrient use efficiency. In order to improve soil and plant health, bring better economic returns to farmers, and reduce the burden on the environment caused by the extensive use of synthetic pesticides, a large amount of research is being carried out.

[0007] Meanwhile, hidden hunger and micronutrient deficiencies are widespread across continents, significantly increasing the global disease burden. Among the micronutrient deficiencies commonly suffered by people globally, 17.3% of the world's population is at risk of insufficient zinc intake (Ashish Sharma, Babita Patni, et al. 2012). One of the main underlying causes of this situation is unbalanced fertilization. Excessive and indiscriminate application of nutrients can lead to severe imbalances and antagonisms, resulting in nutrient deficiencies in agricultural products. Therefore, growing large amounts of food while maintaining the quality of nutritional components is a difficult and challenging task.

[0008] The role of micronutrients as essential elements for plant growth and reproduction has long been known. Micronutrients play an important role in balancing crop nutrition. In addition, it is well known that normal plant function and growth require optimal nutrient levels, and any fluctuations in nutrient levels can lead to overall crop growth retardation and a decline in its health due to nutrient deficiencies or toxicities, which in turn affects the essential nutritional components in the human diet. Due to the low availability of minerals and nutrients in the soil and / or the low accumulation / bioavailability of minerals and elements in the edible parts of crops, it is estimated that nearly 2 billion people globally lack micronutrients such as iron and zinc [Graham et al; 2012; ‘How much nutritional iron deficiency in humans globally is due to an underlying zinc deficiency’]. In addition, insufficient supply of fertilizers or nutrients can also lead to poor plant growth, making plants more vulnerable to pests.

[0009] In addition to low concentrations of essential micronutrients in the soil, one of the root causes of micronutrient deficiencies is the inability of plant roots to access micronutrients in their oxidized forms. In addition, other factors that limit the utilization of essential soil nutrients include the leaching of water-soluble nutrients caused by rain and irrigation, changes in soil carbonate content, soil salinity, soil moisture, soil alkalinity, low temperature, and the concentration of other elements (i.e., "competitive trace elements" that cause micronutrient deficiencies). In addition, the plant's ability to respond to micronutrient availability ultimately affects human nutrition, including crop yield and the concentration of micronutrients in edible tissues. Therefore, proper nutrition is crucial for optimizing plant nutrition and metabolism, which in turn helps to increase the total yield, quality of crops, and nutritious human diets.

[0010] Magnesium (Mg) is an essential macronutrient for plant growth, health, and development. Magnesium is involved in multiple processes, including photosynthesis. The most important role of magnesium is as the central atom or core of the chlorophyll molecule. Without magnesium, chlorophyll cannot capture the solar energy required for photosynthesis. Magnesium also helps activate specific enzyme systems involved in normal plant metabolism. In addition, magnesium is essential for cell division and protein formation and is an important part of plant respiration.

[0011] The availability of magnesium in the soil depends on multiple factors. These include the rock composition of the soil, mobility in the soil, degree of weathering, local climate, and specific agricultural systems, as well as their management practices, such as crop type, planting intensity, crop rotation, and fertilization practices. Since magnesium is highly mobile in plants, magnesium deficiency symptoms first appear in the lower and older leaves and then in the younger leaves. Magnesium deficiency symptoms are manifested as leaf chlorosis, with green veins and margins (i.e., interveinal chlorosis). Purple, red, or brown spots may also appear on the leaves. Magnesium is an essential element for plant growth and development, but its importance in crop production and agriculture has long been overlooked. This is because potential magnesium deficiency is difficult to detect. Magnesium deficiency is a common limiting factor in crop production due to the low content of exchangeable magnesium (ex-Mg) in acidic soils, which can have a negative impact on the sustainability of agricultural development. Magnesium deficiency is an inherent problem in acidic soils due to high soil saturation and poor cation exchange capacity with H+ ions, resulting in long-term leaching of magnesium and affecting magnesium uptake. The most important agronomic means to address soil acidity and solve magnesium deficiency is to apply lime. However, depending on the type of lime, large amounts of magnesium and calcium will enter the soil, which may interfere with the uptake of other cations (such as zinc and iron) through antagonism. Long-term application of NPK fertilizers can lead to a significant decrease in soil pH, further exacerbating soil magnesium deficiency. Therefore, agricultural soils with good magnesium conditions are a prerequisite for ensuring that crop roots can absorb magnesium and transfer it to the edible parts of plants or crops (ultimately providing nutritious food for humans).

[0012] Iron (Fe) is also an essential nutrient element for the growth, development, and reproduction of plants or crops. However, due to its relatively low content, it belongs to the micronutrient category. Iron participates in many important physiological processes of plants, such as the production of chlorophyll, as well as various enzymes and proteins. It also plays a role in the respiration, nitrogen fixation, energy transfer, and metabolism of crops and plants. Once iron is absorbed into the tissues of the upper part of the plant, it is relatively immobile. Therefore, the transfer of iron from one part of the plant to another is restricted, leading to iron deficiency. This deficiency in plants or crops usually results in chlorosis (yellowing). In addition, insufficient iron nutrition can lead to poor nodulation in leguminous crops, resulting in a decrease in the size and yield of the crops. It has been observed that due to factors such as soil carbonate content, salinity, soil moisture, soil alkalinity, low temperature, etc., and the concentrations of other nutrient elements (such as competitive micronutrients like phosphorus and calcium) can also affect the utilization of iron and sometimes cause iron deficiency. Therefore, the iron nutrition management of crops is very difficult. In addition, it is known that excessive phosphorus can lock up and limit the utilization of iron [Nutrient Antagonism - Which nutrient elements affect other nutrient elements? Jason G; 2015']. Moreover, the ability of plants to respond to the utilization of iron ultimately affects human nutrition, including crop yields and the iron concentration in edible plant tissues. Therefore, appropriate iron nutrition is crucial for optimizing crop nutrition and metabolism, which in turn helps to increase crop yields and quality.

[0013] In addition, although acidic soil management practices involve the use of lime to balance or increase the soil pH value, over-application of lime can lead to deficiencies in iron and other micronutrient elements (such as zinc, boron, etc.). Due to the strong correlation between soil iron content and the degree of human iron deficiency, a continuous supply of iron is required to achieve optimal growth and maximum yields.

[0014] In addition, unbalanced fertilization further exacerbates the deficiencies in iron and magnesium, affecting the utilization of iron and magnesium in crops and ultimately affecting the human diet. Sufficient iron content in food crops is crucial for combating iron deficiency anemia, which is one of the largest nutritional disorders globally.

[0015] Therefore, the most limited nutrients, especially iron and magnesium, must be applied evenly at all stages of the crop and at the final harvest to obtain the highest yields, while minimizing nutrient losses and addressing the hidden hunger and nutritional deficiencies of humans.

[0016] Although the benefits of micronutrient elements are well-known, micronutrient deficiencies have been widespread in most agricultural regions of the world in the past few decades, making micronutrient elements a limiting factor in improving plant growth, high yields, and fertilizer efficiency.

[0017] In addition, depending on the elemental mixture and its composition, concentration, etc., the interactions between plant nutrients can be antagonistic or synergistic, which may affect the nutrient utilization efficiency. Due to the application of excessive nutrients, "nutrient antagonism" may occur in plants, i.e., an excess of one element may hinder the absorption of another required element by the plant, and this may occur in elements with similar size and charge (positive or negative), which can lead to plant deficiencies. Some of the most common antagonisms are iron blocking zinc, manganese (or vice versa), magnesium blocking calcium (or vice versa), phosphorus blocking zinc, iron, and potassium blocking magnesium and calcium simultaneously. The antagonism between iron and zinc has been reported in the literature under the title "Effect of Zinc on Iron Transport in Soybean Plants"; Ambler.J.E., Brown J..C, et al; 1970. The antagonism between iron and manganese was also reported in detail by W.E. Totingham and A.J. Beck in 1916 in an article titled "Antagonism between Manganese and Iron in Wheat Growth". Another reason for plant manganese deficiency is "complexation", which occurs when elements are mixed and combined to form insoluble compounds that cannot be absorbed by plant roots. In addition, antagonism between iron and magnesium has also been reported. One article titled "Iron-Magnesium Antagonism in Radish Growth and Metabolism" reported the iron-magnesium antagonism in crops. Therefore, after understanding the antagonism between iron and magnesium, developing an agricultural composition that can overcome this problem and successfully meet the plant nutrient requirements and ultimately the human diet has been a challenge.

[0018] Most of the agricultural compositions known in the art that contain combinations of micronutrients exist in the form of powders or dusts, in which the micronutrients are mixed together. However, such powder compositions can result in an uneven or heterogeneous mixture of active ingredients, which may not be ideal in terms of application and may also result in poor nutrient uptake by plants. Powder compositions not only have problems such as dust generation in practical applications but also pose risks to users, mainly due to eye irritation, inhalation risk, and skin irritation. Such preparations are not easily dispersible and are prone to clogging the nozzles during drip irrigation application, so they are not suitable for irrigation systems. In addition, these compositions have poor suspension rates, resulting in random and uneven distribution of the active ingredients in the target area, which can have adverse effects and affect the effective delivery of nutrients to plants or crops, and also require large amounts of use.

[0019] Some granule or powder compositions involving the use of water-soluble nutrients are known in the art. However, such compositions are easily washed away during heavy rain or irrigation and cannot be absorbed by plants, which can lead to groundwater pollution. As the soil salt content increases, plants are unable to absorb sufficient water and nutrients from the soil. This not only results in a significant decrease in efficiency but also causes serious environmental consequences.

[0020] Compositions comprising fertilizer granules coated with a micronutrient mixture or water-soluble micronutrient granules are also known in the art. However, such compositions are designed to release their active ingredients very slowly, resulting in the active ingredients remaining in the soil for a long time, thus causing plants to be unable to obtain the immediate nutrients they need. Due to insufficient nutrition during the seedling stage of plants, they are vulnerable to various diseases, ultimately leading to poor growth and development and reduced yields. In addition, due to the disintegration and uneven distribution of the fine particles, the water-soluble granule compositions themselves also have some disadvantages. Since the granules disintegrate into randomly and unevenly sized fine particles, such compositions are prone to clogging the nozzles during drip irrigation application and are therefore not suitable for modern irrigation systems.

[0021] Traditionally, the forms of micronutrient compositions known in the art include bentonite granule or lozenge, pill, granule prepared by the melting method, etc. These micronutrient combination products in the form of granules, pills or lozenges containing swelling clay have some disadvantages. These compositions are generally large in size and contain swelling clay, which decomposes into large fine particles of uneven size after swelling in water. Such granules or lozenges also cause irregular release of micronutrients, unable to meet the nutritional requirements of plants, ultimately resulting in poor field efficacy. In addition, due to their own disadvantages, that is, due to decomposition into larger particles resulting in poor dispersion and suspension rates in water, clogging of the nozzles in spray applications, thus affecting the delivery of nutrients to plants or crops, these types of micronutrient compositions are only suitable for broadcast application. Due to these disadvantages, the commercial feasibility or applicability of such prior art compositions containing micronutrients in drip irrigation or sprinkler irrigation systems is negligible, while due to labor shortages and water shortages, drip irrigation or sprinkler irrigation systems have now become an important irrigation method.

[0022] In addition, other formulations disclosed in the art can guide people to obtain liquid compositions. However, due to the presence of a large amount of solvent as a carrier, the active ingredient content of such compositions is low, so they cannot effectively meet the nutritional requirements of plants. In addition, due to being liquid, it is inconvenient to transport large amounts of such products.

[0023] Currently, no suitable composition in the form of a water-dispersible granule containing magnesium and iron has been found, which can enable plants to obtain an effective amount of magnesium and iron, thus meeting the balanced nutritional requirements of plants and solving the disadvantages such as nutritional antagonism of such compositions known in the art.

[0024] The inventor of the present invention unexpectedly found that the composition of the present invention containing magnesium and iron can not only effectively overcome the antagonism between these single nutrient elements, but also exhibit a synergistic effect. Research has found that when the composition of the present invention is formulated with a specific particle size, plants can more easily absorb magnesium and iron nutrient elements. It is worth noting that this synergistic effect in the composition enables magnesium and iron to be rapidly absorbed by the roots through the positive interaction between rhizosphere nutrient elements. In addition, it has also been observed that when the composition of the present invention contains a combination of multiple elements in a specific ratio and is combined with a selected particle size distribution, the composition can cope with the challenges of nutrient element antagonism in the soil, such as the antagonism between magnesium and iron, and between magnesium and potassium, etc.

[0025] It has further been observed that the present composition can prevent the leaching of these nutrients and maximize their absorption by crops, thereby increasing the total yield. The inventor also unexpectedly noticed that the present composition also solves the problem of the unavailability of iron due to the excess of other competing nutrients (such as phosphorus) in highly acidic soils caused by the long-term application of NPK fertilizers. The present composition not only promotes the absorption of iron locked in the soil, but also enables the utilization of other nutrients locked in the soil.

[0026] Even in soils degraded or with changed pH values due to overuse of synthetic fertilizers, the composition of the present invention can play an important role in promoting nutrient absorption. Particularly surprisingly, the composition of the present invention overcomes the problem of insufficient absorption of iron and magnesium caused by the excessive application of NPK fertilizers. The composition of the present invention meets the nutritional requirements of plants by evenly absorbing essential nutrients such as iron and magnesium. Even more surprisingly, the balanced nutrient absorption makes the plants healthier, able to resist pests and diseases, obtain higher nutrient yields in all types of soils, and ultimately improve the overall health of the soil. The composition of the present invention is a highly efficient nutrient utilization composition, which provides a multi-nutrient solution that can improve the absorption rate of crops with just one application, thus meeting the needs of crops.

[0027] The inventor of the present application has determined that the crop nutrient composition in the form of water-dispersible granules comprises a homogeneous mixture of an effective amount of one or more water-insoluble magnesium salts, magnesium complexes or magnesium derivatives and an effective amount of one or more water-insoluble iron salts, iron complexes or iron derivatives with one or more agrochemically acceptable excipients; wherein the composition comprises fine particles in the size range of 0.1 micrometer to 30 micrometers and exhibits excellent field efficacy.

[0028] The composition of the present invention also exhibits excellent physical properties, such as suspension rate, dispersibility and wettability. Summary of the Invention

[0029] The present inventor has determined that a crop nutrient composition in the form of a water-dispersible granule comprises a homogeneous mixture of an effective amount of one or more water-insoluble magnesium salts, magnesium complexes or magnesium derivatives and one or more water-insoluble iron salts, iron complexes or iron derivatives with at least one agrochemically acceptable excipient, which composition provides magnesium and iron that are readily absorbed by plants and increases the total yield of various crops and improves the physiological parameters of plants.

[0030] The composition in the form of a water-dispersible granule of the present application comprises a homogeneous mixture of one or more water-insoluble magnesium salts, magnesium complexes or magnesium derivatives (in a concentration range of 5% to 80% by weight of the total composition) and one or more water-insoluble iron salts, iron complexes or iron derivatives (in a concentration range of 1% to 50% by weight of the total composition) and at least one agrochemically acceptable excipient, wherein the elemental iron is present in a range of 0.01% to 50% by weight of the total composition and the elemental magnesium is present in a range of 0.1% to 50% by weight of the total composition.

[0031] Furthermore, when the composition is in contact with water, the crop nutrient composition in the form of a water-dispersible granule disperses into fine particles in the size range of 0.1 micrometer to 30 micrometers.

[0032] Furthermore, the present invention relates to a method for preparing a crop nutrient composition in the form of a water-dispersible granule, which composition comprises a homogeneous mixture of an effective amount of one or more water-insoluble magnesium salts, magnesium complexes or magnesium derivatives, and an effective amount of one or more water-insoluble iron salts, iron complexes or iron derivatives, and an effective amount of at least one agrochemically acceptable excipient.

[0033] The present invention relates to a method for improving plant health or enhancing plant absorption of nutrients or increasing plant yield by treating at least one of plants, plant propagation materials, sites, plant parts, seeds, seedlings or the surrounding soil with the composition in the form of a water-dispersible granule of the present invention.

[0034] Due to exhibiting excellent physical properties, such as suspension rate, dispersion rate and wettability, the composition of the present invention can also be directly used in microirrigation or drip irrigation systems.

[0035] Description of the Invention

[0036] In describing the specific embodiments of the present invention, for clarity, specific terms have been selected. However, the present invention is not limited to the specific terms selected, and it should be understood that these specific terms encompass all technical equivalents that operate in a similar manner to achieve a similar purpose. It should be understood that any numerical range described herein encompasses all included sub-ranges. In addition, unless otherwise stated, the percentages of components in the composition are expressed as weight percentages or based on the total weight of the composition. Furthermore, the effective doses of iron and magnesium in the compositions applied in field trials are elemental iron and magnesium.

[0037] The terms "a" or "an" as used herein are defined as one or more. The terms "comprising" and / or "having" as used herein are defined as including (i.e., open-ended language).

[0038] The term "derivative" as used in this application should also cover iron-containing minerals, magnesium-containing minerals, etc.

[0039] The term "salt" as used in this application also covers compounds containing iron and magnesium. Compounds of iron include iron(II, III) oxides, and compounds of magnesium include magnesium oxide.

[0040] Nutrient use efficiency (NUE) is an indicator of the degree to which plants utilize available mineral nutrients. Improving NUE is a necessary prerequisite for expanding crop production to marginal lands with insufficient nutrient supply and is also a way to reduce the use of inorganic fertilizers.

[0041] A water-dispersible granule is a preparation that is easily dispersed or dissolved in water to form a fine particle suspension. The "WG" or "WDG" described herein refers to water-dispersible granules. Water-dispersible granules are prepared by mixing ground solid active ingredients with surfactants and other formulation ingredients and aggregating them into small, easily metered particles (aggregates of fine particles). These water-dispersible granules will disperse into finer / primary particles after soaking in water. Water-dispersible granules can be obtained by spray drying or extrusion processes.

[0042] A mixture refers to a combination of two or more substances that have not undergone a chemical reaction. A homogeneous mixture is a mixture in which the overall composition is uniform. The composition of such a mixture is always constant, or the components constituting the mixture are evenly distributed.

[0043] The present invention relates to a crop nutrient composition in the form of water-dispersible granules, which comprises a homogeneous mixture of an effective amount of one or more water-insoluble magnesium salts, magnesium complexes or magnesium derivatives and one or more water-insoluble iron salts, iron complexes or iron derivatives with at least one agrochemically acceptable excipient.

[0044] The composition in the form of a water-dispersible granule of the present invention comprises 5 wt% to 80 wt% of one or more water-insoluble magnesium salts, magnesium complexes or magnesium derivatives, 1 wt% to 50 wt% of one or more water-insoluble iron salts, iron complexes or iron derivatives, and at least one agrochemically acceptable excipient. Wherein, the content of iron element is 0.01% to 50% of the total weight of the composition, and the content of magnesium element is 0.1% to 50% of the total weight of the composition. In addition, the crop nutrient composition is dispersed into fine particles with a size range of 0.1 micrometer to 30 micrometers when added to water, and exhibits improved dispersion rate and suspension rate. According to one embodiment, the agrochemical excipient is a surfactant.

[0045] The inventors unexpectedly found that the composition of the present application in the form of a water-dispersible granule containing both magnesium and iron is not only effective, but also has a synergistic effect. The inventors also noticed that applying this composition can achieve a higher level and more balanced nutrient absorption.

[0046] It was observed that when the composition of the present invention containing a combination of water-insoluble salts, complexes or derivatives of magnesium and iron in a specific ratio is formulated into the form of a water-dispersible granule with a specific fine particle size distribution, surprising effects are noticed.

[0047] The inventors also unexpectedly noticed that the present composition also solves the problem that the iron element cannot be effectively utilized due to the excess of other competing nutrients (such as phosphorus) in highly acidic soils caused by the long-term application of NPK fertilizers. The present composition not only promotes the absorption of the iron element locked in the soil, but also can effectively utilize other nutrients retained in the soil. In addition, the present composition can also prevent the leaching of these nutrients, enabling them to be maximally absorbed by the crops, thereby increasing the total yield.

[0048] According to one embodiment, the crop nutrient composition is in the form of a water-dispersible granule, wherein the size range of the granule is from 0.05 mm to 5.0 mm. According to one embodiment, the crop nutrient composition is in the form of a water-dispersible granule, wherein the size range of the granule is from 0.05 mm to 4.0 mm. According to one embodiment, the crop nutrient composition is in the form of a water-dispersible granule, wherein the size range of the granule is from 0.05 mm to 3.0 mm. Preferably, the crop nutrient composition is in the form of a water-dispersible granule, wherein the size range of the granule is from 0.05 mm to 2.5 mm. Preferably, the crop nutrient composition is in the form of a water-dispersible granule, wherein the size range of the granule is from 0.05 mm to 2 mm. Preferably, the crop nutrient composition is a water-dispersible granule, wherein the size range of the granule is from 0.05 mm to 1.5 mm. Preferably, the crop nutrient composition is a water-dispersible granule, wherein the size range of the granule is from 0.05 mm to 1 mm. More preferably, the crop nutrient composition is a water-dispersible granule, wherein the size range of the granule is from 0.05 mm to 0.5 mm.

[0049] According to one embodiment, the crop nutrient composition in the form of a water-dispersible granule will disperse into fine particles with a size range of from 0.1 μm to 30 μm when added to water, preferably disperse into fine particles with a size range of from 0.1 μm to 25 μm, and more preferably disperse into fine particles with a size range of from 0.1 μm to 20 μm. It is further observed that when the composition of the present invention is formulated into fine particles with a specific particle size of from 0.1 μm to 30 μm, its magnesium and iron nutrient elements are more easily absorbed by plants, thereby increasing the total yield. Therefore, the size range of the crop nutrient composition from 0.1 μm to 30 μm is not only important in terms of convenient application, but also equally important in terms of efficacy.

[0050] According to another embodiment, the crop nutrient composition in the form of a water-dispersible granule of the present invention comprises fine particles with a D50 diameter distribution of about 20 μm, and more preferably, the water-dispersible granule comprises fine particles with a D50 diameter distribution of about 10 μm.

[0051] According to one embodiment, the crop nutrient composition in the form of the water-dispersible granule is in the form of microgranules, wherein the granules are dispersed into fine particles with a size in the range of 0.1 μm to 30 μm.

[0052] According to another embodiment, the water-insoluble iron salts include, but are not limited to, one or more of the following: iron oxide, iron hydroxide, iron phosphate, iron fumarate, iron succinate, iron tartrate, iron sulfide, iron oxalate, iron carbonyl, iron sulfide, iron silicate, iron rust, limonite, iron carbonate; and their complexes, derivatives, and mixtures. The iron oxides include, but are not limited to: ferrous oxide (FeO), iron oxide (Fe2O3) or iron oxide red, and ferrous ferrite (Fe3O4) or iron oxide black. Iron hydroxides include, but are not limited to: iron hydroxide, iron oxide yellow (FeOOH), iron hydroxide (Fe(OH)3), iron(III) hydroxide, iron oxyhydroxide, and limonite. Iron phosphates include, but are not limited to: iron phosphate, iron phosphate dihydrate, iron phosphate hydrate, ferrous pyrophosphate. Iron fumarates include, but are not limited to: ferrous fumarate and iron fumarate. Iron succinates include, but are not limited to: ferrous succinate and ferrous succinate (II) salt. However, those skilled in the art should understand that other water-insoluble iron salts, iron complexes, or iron derivatives can be used without departing from the scope of the present invention.

[0053] According to one embodiment, the water-insoluble iron salts, iron complexes, or iron derivatives comprise one or more iron-containing minerals selected from, but not limited to, the following iron ores: rammelsbergite, taenite, wustite, magnetite, hematite, troilite, goethite, skutterudite, limonite, siderite, pyrite (marcasite), bernardite, clinohumite. However, the above list of ores or minerals is only an example and is not intended to limit the scope of the present invention.

[0054] According to one embodiment, the water-insoluble iron salts, iron complexes, iron derivatives, or mixtures thereof are present in an amount ranging from 1 wt% to 50 wt% of the total composition, wherein elemental iron is present in an amount ranging from 0.01 wt% to 50 wt% of the total composition.

[0055] According to another embodiment, the water-insoluble iron salts, iron complexes, iron derivatives, or mixtures thereof are present in an amount ranging from 1 wt% to 50 wt% of the total composition, wherein elemental iron is present in an amount ranging from 0.01 wt% to 45 wt% of the total composition.

[0056] According to one embodiment, the content of the water-insoluble iron salt, iron complex, iron derivative or a mixture thereof is 1% to 50% of the total weight of the composition. According to one embodiment, the content of the water-insoluble iron salt, iron complex, iron derivative or a mixture thereof is 1% to 40% of the total weight of the composition. According to one embodiment, the content of the water-insoluble iron salt, iron complex, iron derivative or a mixture thereof is 1% to 30% of the total weight of the composition. According to one embodiment, the content of the water-insoluble iron salt, iron complex, iron derivative or a mixture thereof is 1% to 20% of the total weight of the composition. According to one embodiment, the content of the water-insoluble iron salt, iron complex, iron derivative or a mixture thereof is 1% to 10% of the total weight of the composition. According to one embodiment, the content of the water-insoluble iron salt, iron complex, iron derivative or a mixture thereof is 1% to 5% of the total weight of the composition. According to one embodiment, the content of the water-insoluble iron salt, iron complex, iron derivative or a mixture thereof is 2% to 50% of the total weight of the composition. According to one embodiment, the content of the water-insoluble iron salt, iron complex, iron derivative or a mixture thereof is 2% to 40% of the total weight of the composition. According to one embodiment, the content of the water-insoluble iron salt, iron complex, iron derivative or a mixture thereof is 2% to 30% of the total weight of the composition. According to one embodiment, the content of the water-insoluble iron salt, iron complex, iron derivative or a mixture thereof is 2% to 20% of the total weight of the composition. According to one embodiment, the content of the water-insoluble iron salt, iron complex, iron derivative or a mixture thereof is 2% to 10% of the total weight of the composition.

[0057] According to another embodiment, the water-insoluble magnesium salts include but are not limited to one or more of the following: magnesium molybdate, magnesium hydroxide (milk of magnesia), calcium magnesium phosphate, trimagnesium phosphate, magnesium carbonate, magnesium aluminum silicate, calcium magnesium silicate, magnesium trisilicate, magnesium phosphate, magnesium silicate, magnesium oxide, its complexes or derivatives. However, those skilled in the art should understand that other water-insoluble magnesium salts, magnesium complexes, their derivatives or mixtures can also be used without departing from the scope of the present invention.

[0058] According to one embodiment, the water-insoluble magnesium salt, magnesium complex or magnesium derivative contains one or more magnesium-containing minerals, and the magnesium-containing minerals are selected from but not limited to the following magnesium ores: periclase, brucite, sellaite, ascharite, Pertsevite, enstatite, magnesite, ludwigite, ralstonite. However, the above list of ores or minerals is only an example and is not intended to limit the scope of the present invention.

[0059] According to one embodiment, the range of the presence of the water-insoluble magnesium salt, magnesium complex, magnesium derivative or a mixture thereof is 5 wt% to 80 wt% of the total composition, wherein the range of the presence of elemental magnesium is 0.1 wt% to 50 wt% of the total composition.

[0060] According to one embodiment, the content of the magnesium salt, magnesium complex, magnesium derivative or a mixture thereof is 5% to 80% by weight of the total composition. According to one embodiment, the content of the magnesium salt, magnesium complex, magnesium derivative or a mixture thereof is 5% to 70% by weight of the total composition. According to one embodiment, the content of the magnesium salt, magnesium complex, magnesium derivative or a mixture thereof is 5% to 60% by weight of the total composition. According to one embodiment, the content of the magnesium salt, magnesium complex, magnesium derivative or a mixture thereof is 5% to 50% by weight of the total composition. According to one embodiment, the content of the magnesium salt, magnesium complex, magnesium derivative or a mixture thereof is 5% to 40% by weight of the total composition. According to one embodiment, the content of the magnesium salt, magnesium complex, magnesium derivative or a mixture thereof is 5% to 30% by weight of the total composition. According to one embodiment, the content of the magnesium salt, magnesium complex, magnesium derivative or a mixture thereof is 5% to 20% by weight of the total composition. According to one embodiment, the content of the magnesium salt, magnesium complex, magnesium derivative or a mixture thereof is 5% to 10% by weight of the total composition.

[0061] According to another embodiment, the crop nutrient composition in the form of a water-dispersible granule comprises a homogeneous mixture of one or more water-insoluble magnesium salts, magnesium complexes or magnesium derivatives accounting for 5% to 80% by weight of the total composition, one or more water-insoluble iron salts, iron complexes or iron derivatives accounting for 1% to 50% by weight of the total composition, and one or more surfactants accounting for 1% to 40% by weight of the total composition.

[0062] According to one embodiment, the crop nutrient composition in the form of a water-dispersible granule comprises a homogeneous mixture of one or more of magnesium oxide or magnesium silicate or magnesium carbonate or magnesium phosphate or magnesium hydroxide accounting for 5% to 80% by weight of the total composition and one or more of iron oxide or iron carbonate or iron silicate or iron hydroxide or iron phosphate accounting for 1% to 50% by weight of the total composition and one or more agrichemically acceptable excipients; wherein the composition comprises fine particles in the size range of 0.1 micrometer to 30 micrometers.

[0063] According to one embodiment, the crop nutrient composition in the form of a water-dispersible granule comprises a homogeneous mixture of one or more of magnesium oxide or magnesium silicate or magnesium carbonate or magnesium phosphate or magnesium hydroxide accounting for 5% to 80% by weight of the total composition and one or more of iron oxide or iron carbonate or iron silicate or iron hydroxide or iron phosphate accounting for 1% to 50% by weight of the total composition and one or more surfactants accounting for 1% to 40% by weight of the total composition; wherein the composition comprises fine particles in the size range of 0.1 micrometer to 30 micrometers.

[0064] According to one embodiment, the crop nutrient composition may further comprise at least one additional water-insoluble plant nutrient element.

[0065] According to one embodiment, the content of the additional water-insoluble plant nutrient element is 0.01% to 40% of the total weight of the composition.

[0066] According to one embodiment, the crop nutrient composition does not contain a fertilizer mainly composed of alginic acid, urea, gypsum, phosphorus pentoxide, sulfur, or other conventional fertilizers.

[0067] According to one embodiment, the crop nutrient composition does not contain water-insoluble zinc salts or manganese salts, their complexes, or their derivatives.

[0068] According to one embodiment, the crop nutrient composition in the form of water-dispersible granules comprises a homogeneous mixture of one or more water-insoluble magnesium salts, magnesium complexes, or magnesium derivatives accounting for 5% to 80% of the total weight of the composition, and one or more water-insoluble iron salts, iron complexes, or iron derivatives accounting for 1% to 50% of the total weight of the composition, and one or more agrochemically acceptable excipients; wherein the composition comprises fine particles in the size range of 0.1 micrometer to 30 micrometers, and wherein the composition does not contain one or more water-insoluble zinc salts, zinc complexes, or zinc derivatives.

[0069] According to one embodiment, the crop nutrient composition in the form of water-dispersible granules contains at least one agrochemical excipient. According to another embodiment, the agrochemically acceptable excipients for water-dispersible granule formulations include at least one wetting agent, surfactant, emulsifier, dispersant, hydrocolloid, binder, or filler or carrier or diluent, disintegrant, buffer, or pH regulator or neutralizing agent, defoamer, anti-settling agent, anti-caking agent, penetrant, tackifier, thickener, pigment, colorant, stabilizer, or a mixture thereof. According to one embodiment, the surfactant may include one or more of anionic, cationic, nonionic, zwitterionic, and polymeric surfactants. According to one embodiment, the surfactant may include one or more of an emulsifier, wetting agent, and dispersant. However, those skilled in the art should understand that other agrochemically acceptable excipients may be used without departing from the scope of the present invention. These agrochemically acceptable excipients are commercially produced and can be purchased from multiple companies.

[0070] According to one embodiment, the concentration range of the agrochemical excipient is from 0.01% to 94% by weight of the total composition. According to one embodiment, the concentration range of the agrochemical excipient is from 0.01% to 90% by weight of the total composition. According to one embodiment, the concentration range of the agrochemical excipient is at least 94% by weight of the total composition. According to one embodiment, the concentration range of the agrochemical excipient is at least 92% by weight of the total composition. According to one embodiment, the concentration range of the agrochemical excipient is at least 90% by weight of the total composition. According to one embodiment, the concentration range of the agrochemical excipient is at least 75% by weight of the total composition. According to one embodiment, the concentration range of the agrochemical excipient is at least 55% by weight of the total composition. According to one embodiment, the concentration range of the agrochemical excipient is at least 35% by weight of the total composition. According to one embodiment, the concentration range of the agrochemical excipient is at least 25% by weight of the total composition. According to one embodiment, the concentration range of the agrochemical excipient is at least 15% by weight of the total composition. According to one embodiment, the concentration range of the agrochemical excipient is at least 5% by weight of the total composition. According to one embodiment, the concentration range of the agrochemical excipient is at least 1% by weight of the total composition. According to one embodiment, the concentration range of the agrochemical excipient is at least 0.1% by weight of the total composition.

[0071] According to one embodiment, the surfactant used in the crop nutrient composition includes one or more of an emulsifier, a wetting agent, and a dispersant. According to one embodiment, the surfactant used in the composition includes one or more of anionic, cationic, nonionic, zwitterionic, and polymeric surfactants.

[0072] Anionic surfactants include, but are not limited to, one or more of the following: fatty acid salts, benzoates, polycarboxylates, alkyl sulfates, alkyl ether sulfates, alkyl sulfates, alkyl aryl sulfates, alkyl diglycol ether sulfates, alcohol sulfates, alkyl sulfonates, alkyl aryl sulfonates, aryl sulfonates, lignin sulfonates, alkyl diphenyl ether disulfonates, polystyrene sulfonates, alkyl phosphates, alkyl aryl phosphates, styryl aryl phosphates, sulfosuccinates, polyoxyethylene alkyl ether sulfates, polyoxyethylene alkyl aryl ether sulfates, sarcosinates, sodium α-olefin sulfonates, alkyl benzene sulfonates or their salts, sodium lauroyl sarcosinate, sulfosuccinates, polyacrylates, polyacrylates - free acid and sodium salts, polyoxyethylene alkyl aryl ether sulfates, polyoxyethylene alkyl ether phosphates, polyoxyethylene alkyl aryl phosphate salts, sulfosuccinates - monoesters and other diesters, phosphates, isopropyl and butyl derivatives of alkyl naphthalene sulfonates, alkyl ether sulfates - sodium and ammonium salts; alkyl aryl ether phosphates, ethylene oxide and its derivatives, polyoxyethylene aryl ether phosphate salts, monoalkyl sulfosuccinates, aromatic hydrocarbon sulfonates, 2 - acrylamido - 2 - methylpropane sulfonic acid, ammonium lauryl sulfate, sodium dioctyl sulfosuccinate, disodium cocoamido diacetate, magnesium laureth sulfate, phospholipids, potassium lauryl sulfate, soaps, soap substitutes, sodium alkyl sulfate, sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, sodium laurate, sodium laureth sulfate, sodium lauroyl sarcosinate, sodium myreth sulfate, sodium nonanoyloxybenzenesulfonate, alkyl carboxylates, sodium stearate, α - olefin sulfonates, naphthalene sulfonates, fatty acid salts of alkyl naphthalene sulfonates, sodium salts of naphthalene sulfonic acid condensates, fluorocarboxylates, fatty alcohol sulfates, sodium salts of naphthalene sulfonic acid condensates, salts of naphthalene sulfonic acid formaldehyde condensates or alkyl naphthalene sulfonic acid formaldehyde condensates; or their salts or derivatives.

[0073] Nonionic surfactants include, but are not limited to, one or more of the following: polyol esters, polyol fatty acid esters, polyethoxylated esters, polyethoxylated alcohols, ethoxylated and propoxylated fatty alcohols, ethoxylated and propoxylated alcohols, ethylene oxide (EO) / propylene oxide (PO) copolymers; EO and PO block copolymers, diblock and triblock copolymers; polyethylene glycol and polypropylene glycol block copolymers, poloxamers, polysorbates, alkyl polysaccharides (such as alkyl glycosides and their mixtures), amine ethoxylates, sorbitan fatty acid esters, ethylene glycol and glycerol esters, glucoside alkyl ethers, sodium tallowate, polyoxyethylene glycol, sorbitan alkyl esters, sorbitan derivatives, sorbitan fatty acid esters (Spans) and their ethoxylated derivatives (Tweens), sucrose fatty acid esters, coconut amide diethanolamine (DEA), coconut amide monoethanolamine (MEA), decyl glucoside, decyl polyglucoside, glycerol monostearate, lauryl glucoside, maltoside, glycerol monolaurate, narrow distribution ethoxylated esters, Nonidet P-40, nonylphenol ethoxylate-9, nonylphenol ethoxylate, octaethylene glycol monododecyl ether, N-octyl-β-D-thioglucopyranoside, octyl glucoside, oleyl alcohol, PEG-10 sunflower glyceride, pentaethylene glycol monododecyl ether, polidocanol, poloxamer, poloxamer 407, polyethoxylated tallow amine, polyglycerol polyricinoleate, polysorbate, polysorbate 20, polysorbate 80, sorbitan anhydride, sorbitan monolaurate, sorbitan monostearate, sorbitan tristearate, stearyl alcohol, surfactin, glycerol laurate, lauryl glucoside, nonylphenol ethoxylate, nonylphenol polyethylene glycol ether, castor oil ethoxylate, polyethylene glycol ether, polyaddition product of ethylene oxide and propylene oxide, block copolymer of polyalkylene glycol ether and hydroxystearic acid, tributylphenoxy polyoxyethylene ethanol, octylphenoxy polyoxyethylene ethanol, ethoxylated-propoxylated triphenylvinyl phenol, ethoxylated alcohol, polyoxyethylene sorbitan anhydride, fatty acid polyglycerol esters, fatty alcohol polyethylene glycol ethers, acetylene diol, acetylene alcohol, oxyalkylene block polymer, polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethylene styryl aryl ether, polyoxyethylene glycol alkyl ether, polyethylene glycol, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyoxyethylene glycerol fatty acid esters, alcohol ethoxylates (C6 to C16 / 18 alcohols, straight and branched chain), alcohol alkoxylates (different hydrophobic groups and EO / PO contents and ratios), fatty acid esters (monoesters and diesters; lauric, stearic and oleic based), glycerol esters (with or without EO; lauric, stearic, cocoa butter and tall oil derived), ethoxylated glycerol, sorbitan esters (with or without EO; lauric, stearic and oleic based; monoesters and triesters), castor oil ethoxylates (5 to 200 moles of EO; unhydrogenated and hydrogenated), block polymers, amine oxides (ethoxylated and non-ethoxylated;Alkyl dimethyl type), fatty amine ethoxylates (coconut amine, tallow amine, stearyl amine, oleyl amine), polyoxyethylene hydrogenated castor oil or polyoxypropylene fatty acid ester; or its salts or derivatives; gum arabic, karaya gum, Indian gum (davada gum), larch gum, collagen (fish), welan gum, acacia gum, okra gum, bara gum, carob gum, cordia gum, ghatti gum, kondagogu, leucaena seed gum, sterculia lychnophora gum, dolichos lablab gum, moringa gum, neem gum, sesbania gum.;

[0074] Amphoteric surfactants include, but are not limited to, one or more of the following: betaine, cocamidopropyl betaine and lauramidopropyl betaine, coconut alkyl dimethylamine oxide, alkyl dimethyl betaine (C8 to C18), alkyl dipropionate (such as sodium lauroiminodipropionate), cocamidopropyl hydroxysulfobetaine, imidazolines, phospholipids (such as phosphatidylserine, phosphatidylethanolamine, phosphatidylcholine, sphingomyelin), lauryl dimethylamine oxide, alkyl amphoacetate / propionate, alkyl ampho(di)acetate and dipropionate, lecithin and ethanolamine fatty acid amide; or its salts or derivatives.

[0075] However, those skilled in the art should understand that other conventionally known surfactants can be used without departing from the scope of the present invention. These surfactants are commercially produced and can be purchased from multiple companies.

[0076] According to one embodiment, the content of the surfactant is 0.1% to 40% w / w of the total composition. According to one embodiment, the content of the surfactant is 0.1% to 30% w / w of the total composition. According to another embodiment, the content of the surfactant is 0.1% to 20% w / w of the total composition. According to one embodiment, the content of the surfactant is 0.1% to 10% w / w of the total composition.

[0077] According to one embodiment, the dispersants used in the crop nutrient composition include, but are not limited to, one or more of the following: polyvinylpyrrolidone, polyvinyl alcohol, lignosulfonate, phenonaphthalenesulfonate, alkali metal salts, alkaline earth metal salts and ammonium salts of lignosulfonic acid, lignin derivatives, dibutylnaphthalenesulfonic acid, alkylarylsulfonate, alkyl sulfate, alkyl sulfonate, fatty alcohol sulfate, fatty acid and sulfonated fatty alcohol polyethylene glycol ether, polyoxyethylene alkyl ether, dioctyl sulfosuccinate, lauryl sulfate, polyoxyethylene alkyl ether sulfate, polyoxyethylene styrylphenyl ether sulfate salt and its analogues, their alkali metal salts, ammonium salts or amine salts, polyoxyethylene alkylphenyl ether, polyoxyethylene styrylphenyl ether, polyoxyethylene alkyl ester or polyoxyethylene sorbitan alkyl ester, etc., a mixture of sodium salt of naphthalenesulfonic acid urea formaldehyde condensate and sodium salt of phenolsulfonic acid formaldehyde condensate, ethoxylated alkylphenol, ethoxylated fatty acid, alkoxylated linear alcohol, polyarylsulfonate, sodium alkylarylsulfonate, glyceride, ammonium salt of maleic anhydride copolymer, maleic anhydride copolymer, phosphate ester, condensation product of arylsulfonic acid and formaldehyde, addition product of ethylene oxide and fatty acid ester, salt of addition product of ethylene oxide and fatty acid ester, sodium salt of isodecyl sulfosuccinate half ester, polycarboxylate, sodium alkylbenzenesulfonate, sodium salt of sulfonated naphthalene, ammonium salt of sulfonated naphthalene, polyacrylate, sodium condensed phenolsulfonate and naphthalenesulfonic acid-formaldehyde condensate, sodium naphthalenesulfonate formaldehyde condensate, triphenylvinylphenol polyoxyethylene ether phosphate; fatty alcohol ethoxylate; alkyl fatty acid, alkoxylated linear alcohol, polyarylsulfonate, sodium alkylarylsulfonate, glyceride, ammonium salt of maleic anhydride copolymer, maleic anhydride copolymer, phosphate ester, condensation product of arylsulfonic acid and formaldehyde, addition product of ethylene oxide and fatty acid ester, salt of addition product of ethylene oxide and fatty acid ester, sodium salt of isodecyl sulfosuccinate half ester, polycarboxylate, sodium alkylbenzenesulfonate, sodium salt of sulfonated naphthalene, ammonium salt of sulfonated naphthalene, polyacrylate, sodium condensed phenolsulfonate and naphthalenesulfonic acid-formaldehyde condensate, sodium naphthalenesulfonate formaldehyde condensate, triphenylvinylphenol polyoxyethylene ether phosphate; fatty alcohol ethoxylate; alkyl ethoxylate; EO-PO block copolymer; graft copolymer, ammonium salt of sulfonated naphthalene, polyacrylate; or its salts or derivatives.

[0078] Commercially available dispersants include "Morwet D425" (sodium naphthalene formaldehyde condensate, produced by Nouryon, USA), "Morwet EFW" (sulfated alkyl carboxylic acid and sodium alkylnaphthalenesulfonate), "Tamol PP" (sodium phenolsulfonic acid condensate), "Reax80N" (sodium lignosulfonate) and "Wettol D1" (sodium alkylnaphthalenesulfonate, produced by BASF). However, those skilled in the art should understand that other conventionally known dispersants can be used without departing from the scope of the present invention. These dispersants are all commercially available products and can be purchased from multiple companies.

[0079] According to one embodiment, the hydrocolloids useful in the present invention include water-absorbing colloids of natural origin, including those of plant, animal, or microbial origin. The hydrocolloids used in the organic agricultural composition include one or more anionic, cationic, non-ionic, amphoteric, or hydrophobic hydrocolloids. According to one embodiment, the hydrocolloid includes one or more of gum arabic, gum karaya, gum ghatti, larch gum, collagen (fish glue), welan gum, gum acacia, abelmoschus manihot gum, bassora gum, carob gum, codia gum, gmelina arborea gum, hackelia gum, kaya gum, katila gum, kondagogu gum, leucena seed gum, malva sylvestris gum, dolichos lablab gum, moringa gum, azadirachta indica gum, sesbania gum, or a mixture thereof. Preferably, the hydrocolloid is an anionic hydrocolloid selected from gum arabic, gum karaya, gum ghatti, azadirachta indica gum, and moringa gum. However, the above list of hydrocolloids is only an example and is not intended to limit the scope of the present invention.

[0080] According to one embodiment, the content of the hydrocolloid is 0.1%-40% w / w of the total composition. According to one embodiment, the content of the hydrocolloid is 0.1%-30% w / w of the total composition. According to one embodiment, the content of the hydrocolloid is 0.1%-20% w / w of the total composition.

[0081] According to one embodiment, the wetting agents used in the crop nutrient composition include, but are not limited to, one or more of the following: phenol naphthalene sulfonate, alkyl naphthalene sulfonate, sodium alkyl naphthalene sulfonate, sodium naphthalene sulfonate, sulfonated alkyl carboxylate sodium salt, polyoxyalkylated ethyl phenol, polyoxyethylated fatty alcohol, polyoxyethylated fatty amine, lignin derivative, alkyl sulfonate, alkyl benzene sulfonate, polycarboxylate, sulfosuccinate, alkyl polyethylene glycol ether sulfonate, alkyl ether phosphate, alkyl ether sulfate, and alkyl sulfosuccinate monoester; salts or derivatives thereof. However, those skilled in the art should understand that other conventionally known wetting agents can also be used without departing from the scope of the present invention. These wetting agents are all commercial products and can be purchased from multiple companies.

[0082] According to one embodiment, the content of the wetting agent is 0.1%-30% w / w of the total amount of the composition. According to one embodiment, the content of the wetting agent is 0.1%-20% w / w of the total amount of the composition. According to one embodiment, the content of the wetting agent is 0.1%-10% w / w of the total amount of the composition.

[0083] The emulsifiers used in the crop nutrient composition include, but are not limited to, one or more of the following: Atlas G5000, TERMUL 5429, TERMUL 2510, 118, X, OX-080, C 100, EL 200, Arlacel P135, Hypermer 8261, Hypermer B239, Hypermer B261, Hypermer B246sf, Solutol HS 15, Promulgen TM D, Soprophor 7961P, Soprophor TSP / 461, Soprophor TSP / 724, Croduret40, Etocas 200, Etocas 29, RokacetR26, CHEMONIC OE-20, Triton Tm N-101, Tween 20, 40, 60, 65, 80, Span20, 40, 60, 80, 83, 85, 120, Triton TM And Atlox 4912 can also be used. However, those skilled in the art should understand that other conventionally known emulsifiers can be used without departing from the scope of the present invention. These emulsifiers are all commercially available products and can be purchased from multiple companies.

[0084] According to one embodiment, the content of the emulsifier is 0.1% - 40% w / w of the total composition. According to one embodiment, the content of the emulsifier is 0.1% - 30% w / w of the total composition. According to one embodiment, the content of the emulsifier is 0.1% - 20% w / w of the total composition.

[0085] According to one embodiment, the disintegrants for the crop nutrition composition include, but are not limited to, one or more of the following: inorganic water-soluble salts, such as sodium chloride, nitrate; water-soluble organic compounds, such as hydroxypropyl starch, carboxymethyl starch ether, microcrystalline cellulose, cross-linked sodium carboxymethyl cellulose, calcium carboxymethyl cellulose, sodium tripolyphosphate, sodium hexametaphosphate, cellulose powder, dextrin, methacrylate copolymer, XL-10 (cross-linked polyvinylpyrrolidone), sulfonated styrene-isobutene-maleic anhydride copolymer, methacrylate polyacrylate, starch-polyacrylonitrile graft copolymer, sodium bicarbonate / sodium carbonate or potassium bicarbonate / potassium carbonate, or their mixed salts or derivatives with acids such as citric acid, fumaric acid. However, those skilled in the art should understand that different disintegrants can be used without departing from the scope of the present invention. These disintegrants are all commercially produced products and can be obtained from multiple companies.

[0086] According to one embodiment, the content of the disintegrant is 0.1% to 20% w / w of the composition. According to one embodiment, the content of the disintegrant is 0.1% to 10% w / w of the composition. According to one embodiment, the content of the disintegrant is 0.1% to 5% w / w of the composition.

[0087] According to one embodiment, the binding agent or binders used in the crop nutrient composition include, but are not limited to, one or more of the following: proteins, lipoproteins, glycoproteins, carbohydrates (such as monosaccharides, disaccharides, oligosaccharides, and polysaccharides), complex organic substances, lignosulfonates, polyvinylpyrrolidone, synthetic organic polymers or their derivatives, and combinations thereof. However, those skilled in the art should understand that different binding agents can be used without departing from the scope of the present invention. The binding agents are commercially produced and can be purchased from multiple companies.

[0088] According to another embodiment, the content of the binding agent is 0.1% to 30% w / w of the composition. According to another embodiment, the content of the binding agent is 0.1% to 20% w / w of the composition. According to another embodiment, the content of the binding agent is 0.1% to 10% w / w of the composition.

[0089] According to one embodiment, the carriers used in the crop nutrient composition include, but are not limited to, one or more solid carriers, fillers, or diluents. According to another embodiment, the carriers include mineral carriers, plant carriers, synthetic carriers, and water-soluble carriers. However, those skilled in the art should understand that different carriers can be used without departing from the scope of the present invention. These carriers are commercially produced and can be purchased from multiple companies.

[0090] Solid carriers include: natural clay minerals such as kaolin, acid clay, kaolin (such as kaolinite, dickite, nacrite, halloysite), serpentine (such as chrysotile, lizardite, antigorite, penninite), synthetic and diatomaceous silica, montmorillonite minerals (such as sodium montmorillonite), soapstone (such as soapstone, lithium montmorillonite, zinc montmorillonite, natrosilite), mica (such as pyrophyllite, talc, pyrophyllite, muscovite, paragonite, sericite, illite), silica (such as cristobalite and quartz), attapulgite and sepiolite; vermiculite soapstone, pumice, bauxite, hydrated alumina, perlite, sodium bicarbonate, wollastonite clay, limestone, natural and synthetic silicates, charcoal, silica, wet silica, dry silica, calcined products of wet silica, surface-modified silica, mica, zeolite, diatomaceous earth and its derivatives, chalk Fuller's earth, loess, mirabilite, silica white, slaked lime, synthetic silicic acid, starch, modified starch (Pineflow, produced by Matsutani Chemical Industry Co., Ltd., Japan), cellulose, plant carriers such as cellulose, rice husk, wheat flour, wood flour, starch, rice bran, wheat bran, and soybean flour, sodium caseinate, sucrose, salt cake, potassium pyrophosphate, sodium tripolyphosphate, or their derivatives or mixtures. Commercially available silicate products include the Aerosil brand, Sipernat brand (such as 50S and CALFLO E), as well as kaolin 1777. However, those skilled in the art should understand that different solid carriers can also be used without departing from the scope of the present invention. These solid carriers are all commercially produced and available on the market by multiple companies.

[0091] According to one embodiment, the content of the carrier is 0.1% to 94% w / w of the composition. According to another embodiment, the content of the carrier is 0.1% to 80% w / w of the composition. According to another embodiment, the content of the carrier is 0.1% to 60% w / w of the composition. According to another embodiment, the content of the carrier is 0.1% to 40% w / w of the composition. According to another embodiment, the content of the carrier is 0.1% to 20% w / w of the composition.

[0092] According to one embodiment, the defoamer or antifoaming agent used in the crop nutrient composition includes, but is not limited to, one or more of silica, silicone, silica, polydimethylsiloxane, alkyl polyacrylate, ethylene oxide / propylene oxide copolymer, polyethylene glycol, silicone oil, magnesium stearate or its derivatives. Preferred defoamers include silicone emulsions (e.g., SRE, Wacker or Rhodia's ), long-chain alcohols, fatty acids, fluorinated organic compounds. However, those skilled in the art should understand that other conventionally known defoamers can be used without departing from the scope of the present invention. These defoamers are commercially produced and can be purchased through multiple companies.

[0093] According to one embodiment, the content of the defoamer is 0.01% to 20% w / w of the total composition.

[0094] According to one embodiment, the pH adjuster, buffer or neutralizer used in the composition includes acids and bases of organic or inorganic type and mixtures thereof. According to another embodiment, the pH adjuster, buffer or neutralizer includes, but is not limited to, one or more of organic acids, inorganic acids, and alkali metal compounds or their salts and derivatives. According to one embodiment, the organic acids include, but are not limited to, one or more of citric acid, malic acid, adipic acid, fumaric acid, maleic acid, succinic acid, and tartaric acid, or their salts and derivatives; and the mono-salts, di-salts or tri-salts of these acids or their derivatives. The alkali metal compounds include, but are not limited to, one or more of the following: alkali metal hydroxides (such as sodium hydroxide and potassium hydroxide), alkali metal carbonates (such as sodium carbonate), alkali metal bicarbonates (such as sodium bicarbonate), and alkali metal phosphates (such as sodium phosphate) and mixtures thereof. According to one embodiment, the inorganic acid salts include, but are not limited to, one or more of the following: alkali metal salts, such as sodium chloride, potassium chloride, sodium nitrate, potassium nitrate, sodium sulfate, potassium sulfate, monosodium hydrogen phosphate, monopotassium hydrogen phosphate, sodium dihydrogen phosphate, potassium dihydrogen phosphate, etc. Mixtures can also be used to prepare the pH adjuster, buffer or neutralizer. However, those skilled in the art should understand that other conventionally known pH adjusters, buffers or neutralizers can also be used without departing from the scope of the present invention. These pH adjusters, buffers or neutralizers are all commercially produced products and can be purchased from multiple companies.

[0095] According to one embodiment, the content of the pH adjuster or buffer is 0.01% to 20% w / w of the total composition. According to one embodiment, the content of the pH adjuster or buffer is 0.01% to 10% w / w of the total composition. According to one embodiment, the content of the pH adjuster or buffer is 0.01% to 5% w / w of the total composition. According to one embodiment, the content of the pH adjuster or buffer is 0.01% to 1% w / w of the total composition.

[0096] According to one embodiment, the spreading agent used in the composition includes, but is not limited to, one or more of the following substances: copolymers of maleic acid and styrene compounds, (meth)acrylic acid copolymers, half-esters of polymers of polyols and dicarboxylic anhydrides, water-soluble salts of polystyrene sulfonic acid, fatty acids, latexes, fatty alcohols, vegetable oils (such as cottonseed oil), non-mineral oils, petroleum distillate oils, modified trisiloxanes, polyethylene glycols, polyethers, inclusion compounds or their salts or derivatives. However, those skilled in the art should understand that other conventionally known spreading agents can be used without departing from the scope of the present invention. The spreading agent is commercially produced and can be purchased from multiple companies.

[0097] According to one embodiment, the content of the dispersant is 0.01% to 20% w / w of the total amount of the composition. According to one embodiment, the content of the dispersant is 0.01% to 5% w / w of the total amount of the composition.

[0098] According to one embodiment, the adhesives used in the composition include, but are not limited to, one or more of the following: paraffin wax, polyamide resin, polyacrylate, polyethylene oxide, wax, polyvinyl alkyl ether, alkylphenol-formaldehyde condensate, fatty acid, latex, polyvinylpyrrolidone, fatty alcohol, gums (such as xanthan gum, gum ghatti, gum arabic, etc.), vegetable oil (such as cottonseed oil) or mineral oil, petroleum fraction, modified trisiloxane, polyethylene glycol, polyether, clathrate, synthetic resin emulsion or its salts or derivatives. However, those skilled in the art should understand that other conventionally known adhesives can be used without departing from the scope of the present invention. These adhesives are commercially produced and can be purchased from multiple companies.

[0099] According to one embodiment, the content of the adhesive is 0.01% to 30% w / w of the total amount of the composition. According to one embodiment, the content of the adhesive is 0.01% to 15% w / w of the total amount of the composition.

[0100] The present inventors further determined that the composition of the present invention surprisingly has physical properties of enhanced dispersion rate, suspension rate, and wetting time, providing ease of handling and also reducing material loss during packaging and during product handling at the application site.

[0101] The dispersion rate of the composition in the form of water-dispersible granules of the present application can be determined according to the standard CIPAC test MT 174. According to one embodiment, the dispersion rate of the composition in the form of water-dispersible granules is at least 30%. According to one embodiment, the dispersion rate of the composition in the form of water-dispersible granules is at least 40%. According to one embodiment, the dispersion rate of the composition in the form of water-dispersible granules is at least 50%. According to one embodiment, the dispersion rate of the composition in the form of water-dispersible granules is at least 60%. According to one embodiment, the dispersion rate of the composition in the form of water-dispersible granules is at least 70%. According to one embodiment, the dispersion rate of the composition in the form of water-dispersible granules is at least 80%. According to one embodiment, the dispersion rate of the composition in the form of water-dispersible granules is at least 90%. According to one embodiment, the dispersion rate of the composition in the form of water-dispersible granules is at least 99%. According to one embodiment, the dispersion rate of the water-dispersible granular composition is 100%. When the composition of the present invention comes into contact with water, it can be uniformly dispersed into fine particles with a size range of 0.1 micrometer to 30 micrometers.

[0102] According to one embodiment, the crop nutrient composition in the form of water-dispersible granules can be dispersed almost instantaneously, making the active ingredients easily absorbed by the crops.

[0103] The suspension rate is defined as the amount of active ingredient suspended in a liquid column at a specified height after a specified time, expressed as a percentage of the amount of active ingredient in the original suspension. The suspension rate test is carried out in accordance with the CIPAC Handbook "MT 184 Suspension Rate Test".

[0104] According to one embodiment, the suspension rate of the composition of the present invention is at least 30%. According to one embodiment, the suspension rate of the composition is at least 40%. According to one embodiment, the suspension rate of the composition is at least re%. According to one embodiment, the suspension rate of the composition is at least 60%. According to one embodiment, the suspension rate of the composition is at least 70%. According to one embodiment, the suspension rate of the composition is at least 80%. According to one embodiment, the suspension rate of the composition is at least 90%. According to one embodiment, the suspension rate of the composition is at least 99%. According to one embodiment, the suspension rate of the pesticidal composition is at least 100%.

[0105] According to one embodiment, the composition of the present invention exhibits excellent stability in terms of the suspension rate under accelerated storage conditions (ATS). According to one embodiment, the composition exhibits a suspension rate of more than 90% under ATS. According to one embodiment, the composition exhibits a suspension rate of more than 80% under ATS. According to one embodiment, the composition exhibits a suspension rate of more than 70% under ATS. According to one embodiment, the composition exhibits a suspension rate of more than 60% under ATS. According to one embodiment, the composition exhibits a suspension rate of more than 50% under ATS. According to one embodiment, the composition exhibits a suspension rate of more than 40% under ATS. According to one embodiment, the composition exhibits a suspension rate of more than 30% under ATS.

[0106] According to one embodiment, the composition of the present invention exhibits a dispersion rate of more than 90% under ATS. According to one embodiment, the composition exhibits a dispersion rate of more than 80% under ATS. According to one embodiment, the composition exhibits a dispersion rate of more than 70% under ATS. According to one embodiment, the composition exhibits a dispersion rate of more than 60% under ATS. According to one embodiment, the composition exhibits a dispersion rate of more than 50% under ATS. According to one embodiment, the composition exhibits a dispersion rate of more than 40% under ATS. According to one embodiment, the composition exhibits a dispersion rate of more than 30% under ATS.

[0107] According to one embodiment, the composition of the present invention exhibits excellent thermal, light, temperature and anti-caking stability. According to one embodiment, the stability of the composition is at least 3 years. According to another embodiment, the stability of the composition is at least 2 years. According to another embodiment, the stability of the composition is at least 1 year. According to another embodiment, the stability of the composition is at least 6 months.

[0108] According to one embodiment, the present invention relates to a method for preparing a crop nutrient composition in the form of a water-dispersible granule, the composition comprising a homogeneous mixture of an effective amount of one or more water-insoluble magnesium salts, magnesium complexes or magnesium derivatives and an effective amount of one or more water-insoluble iron salts, iron complexes or iron derivatives with at least one agrochemically acceptable excipient.

[0109] According to another embodiment, the present invention relates to a method for preparing a crop nutrient composition in the form of a water-dispersible granule, the composition comprising a homogeneous mixture of one or more water-insoluble magnesium salts, magnesium complexes or magnesium derivatives in an amount of 5%-80% w / w of the total composition and one or more water-insoluble iron salts, iron complexes or iron derivatives in an amount of 1%-50% w / w of the total composition with at least one agrochemically acceptable excipient; wherein elemental iron accounts for 0.01% to 50% of the total composition by weight, elemental magnesium accounts for 0.1% to 50% of the total composition by weight, and wherein the granules of the composition comprise fine particles in the size range of 0.1 micron to 30 microns.

[0110] The crop nutrient composition in the form of a water-dispersible granule can be prepared by various techniques such as spray drying, fluidized bed granulation, extrusion, freeze drying, spheronization, etc.

[0111] According to one embodiment, the method for preparing a water-dispersible granule composition comprises: grinding one or more water-insoluble iron salts, iron complexes or iron derivatives, and one or more water-insoluble magnesium salts, magnesium complexes or magnesium derivatives with at least one agrochemically acceptable excipient into a homogeneous mixture to obtain a slurry or a wet mixture in water. Then the obtained slurry is dried in, for example, a spray dryer, a fluidized bed dryer or any suitable granulation equipment to obtain a water-dispersible granule comprising fine particles in the size range of 0.1 micron to 30 microns. The water-dispersible granule is further sieved to remove granules with too small and too large sizes and obtain the desired size.

[0112] According to another embodiment, the crop nutrient composition in the form of a water-dispersible granule can also be prepared as follows: dry-grinding one or more water-insoluble iron salts, iron complexes or iron derivatives and one or more water-insoluble magnesium salts, magnesium complexes or magnesium derivatives with at least one agrochemically acceptable excipient in a jet mill or a jet grinder to obtain a homogeneous mixture with a fine particle size. Water is added to the dry powder agent, and the mixture is mixed to obtain a dough-like, paste-like or wet mixture, and then extruded through an extruder to obtain granules comprising fine particles in the size range of 0.1 micron to 30 microns. The water-dispersible granule is further sieved to remove particles with too small and too large sizes and obtain the desired size.

[0113] According to one embodiment, the present invention also relates to the use of the crop nutrient composition as at least one of a nutrient composition, a crop fortifier composition, a soil conditioner composition, a crop protectant, and a yield enhancer composition.

[0114] According to one embodiment, the present invention also relates to a method for improving plant health or yield, wherein the method comprises treating at least one of a plant, plant propagation material, a site, or a plant part, a seed, a seedling, or the surrounding soil with the composition in the form of a water-dispersible granule of the present invention.

[0115] According to one embodiment, the present invention also relates to a method of applying an effective amount of a crop nutrient composition in the form of a water-dispersible granule, the composition comprising a homogeneous mixture of 5 wt% to 80 wt% of one or more water-insoluble magnesium salts, magnesium complexes, or magnesium derivatives, 1 wt% to 50 wt% of one or more water-insoluble iron salts, iron complexes, or iron derivatives, and 0.01 wt% to 94 wt% of an agrochemically acceptable excipient, wherein elemental iron accounts for 0.01 wt% to 50% of the total weight of the composition, elemental magnesium accounts for 0.1 wt% to 50% of the total weight of the composition, and wherein the granules of the composition consist of fine particles in the size range of 0.1 micrometer to 30 micrometers, and wherein the composition is applied to seeds, seedlings, crops, plants, plant propagation materials, sites, plant parts, or the surrounding soil.

[0116] The present invention also provides balanced absorption of all nutrients, improves crop health, improves crop nutrition by promoting the absorption of essential nutrients, protects crops, increases crop yields, fortifies plants, or helps condition the soil.

[0117] The composition of the present invention meets the nutritional requirements of plants by providing balanced absorption of essential nutrient elements such as iron and magnesium, thereby overcoming the challenge of providing nutrient-rich crops or nutrient-efficient compositions by changing the soil pH value, as the pH value is known to hinder the absorption of these nutrient elements. More surprisingly, balanced nutrient absorption can make plants healthier, able to resist pests and diseases, increase nutrient yields in all types of soils, and ultimately improve the overall health of the soil. The composition of the present invention is a composition with high nutrient utilization efficiency, and at the same time meets the needs of crops by providing a multi-nutrient solution, which can improve the absorption rate of crops with just one application.

[0118] The present composition can be applied by a variety of methods. The methods of applying to the soil include any suitable method as long as it can ensure the penetration of the composition into the soil, such as application in seedling trays, furrow application, drip irrigation, sprinkler irrigation, soil soaking, soil injection, or incorporation into the soil and other methods. The composition can also be applied in the form of a foliar spray.

[0119] The application rate or dosage of the composition depends on the type of use, the type of crop, or the specific active ingredient in the composition, but the amount of the active ingredient should be effective to provide the desired effects, such as crop protection, crop yield, and nutrient uptake.

[0120] A. Preparation Examples:

[0121] The following examples illustrate the basic methods and versatility of the compositions of the present invention. Sources of iron and magnesium are exemplified in the preparation examples and can be replaced with any other water-insoluble salts, complexes, or their derivatives covered by the present invention, provided that the concentration ranges required in the claims are changed accordingly. It should be noted that the present invention is not limited to these examples.

[0122] Composition in the form of a water-dispersible granule of a magnesium salt and an iron salt:

[0123] 1: A composition in the form of a water-dispersible granule of 17% iron oxide (elemental iron content 12%) and 54.5% magnesium silicate (elemental magnesium content 9.5%).

[0124] The preparation of the composition in the form of a water-dispersible granule is as follows: 17 parts of iron oxide, 54.5 parts of magnesium silicate, 3.5 parts of naphthalene sulfonate condensate, 8 parts of lignosulfonate, 7 parts of sodium lignosulfonate, 5 parts of kaolin, and 5 parts of sodium citrate are mixed. The resulting mixture is ground into a powder with a particle size less than 15 microns. The powder is mixed with water in a suitable mixing device to form a slurry.

[0125] The resulting slurry is wet-milled in a suitable wet-milling device. The wet-milled slurry is spray-dried at an inlet temperature below 175°C and an outlet temperature below 90°C to obtain granules. The particle size distribution D50 of this composition is less than 5.5 microns. The granule size of this composition is in the range of 0.1 - 1.5 mm. The dispersion rate of this composition is 70%, the suspension rate is 65%, and the wettability is less than 25 seconds. Under accelerated storage conditions, the suspension rate of this composition is about 60%, the dispersion rate is 65%, and the wettability is 30 seconds.

[0126] 2: A composition in the form of a water-dispersible granule of 40% iron silicate (elemental iron 13.4%) and 40% magnesium carbonate (elemental magnesium 11.5%).

[0127] This water-dispersible composition is prepared as in Example 1 and is composed of 40 parts of magnesium carbonate, 40 parts of iron silicate, 6 parts of naphthalene sulfonate condensate, 4 parts of sodium polycarboxylate, and 10 parts of talc. The particle size distribution D50 of this composition is less than 6.3 microns. The granule size of this composition is in the range of 0.1 - 2 mm. The dispersion rate of this composition is 85%, the suspension rate is 80%, and the wettability is less than 20 seconds. Under accelerated storage conditions, the suspension rate of this composition is about 75%, the dispersion rate is 81%, and the wettability is 25 seconds.

[0128] 3: A composition in the form of a water-dispersible granule of 5% ferrous silicate (elemental iron content 1.6%) and 80% magnesium oxide (elemental magnesium content 48%).

[0129] The water-dispersible composition was prepared according to Example 1 by mixing 5 parts of ferrous silicate, 80 parts of magnesium oxide, 6 parts of Geropon T77, 4 parts of Indian gum, and 5 parts of fulvic acid. The particle size distribution D50 of the composition is less than 9.5 microns. The granule size of the composition is in the range of 0.1 - 2.0 mm. The dispersion rate of the composition is 79%, the suspension rate is 80%, and the wettability is less than 15 seconds. Under accelerated storage conditions, the suspension rate of the composition is about 76%, the dispersion rate is 70%, and the wettability is 20 seconds.

[0130] 4: A composition in the form of a water-dispersible granule of 25% iron oxide (iron element content 17.4%) and 35% magnesium oxide (magnesium element content 21.11%).

[0131] The water-dispersible composition was prepared according to Example 1 and is composed of 25 parts of iron oxide, 35 parts of magnesium oxide, 15 parts of sodium alkylbenzene sulfonate, 15 parts of sodium naphthalene sulfonate condensate, 8 parts of sodium polycarboxylate, and 2 parts of silica. The particle size distribution of the composition is as follows: D50 is less than 12 microns. The granule size of the composition is in the range of 0.1 - 2.5 mm. The dispersion rate of the composition is 78%, the suspension rate is 75%, and the wettability is less than 25 seconds. The composition also exhibits a suspension rate of about 68%, a dispersion rate of about 73%, and a wettability of about 20 seconds under accelerated storage conditions.

[0132] 5: A composition in the form of a water-dispersible granule of 2% iron phosphate (elemental iron content 0.74%) and 75% magnesium phosphate (elemental magnesium content 20.6%).

[0133] The water-dispersible composition was mixed by an extrusion process from 75 parts of magnesium phosphate, 2 parts of iron phosphate, 4 parts of gum arabic, 12 parts of fulvic acid, and 7 parts of Stepsperse DF200. The particle size distribution D50 of the composition is less than 20 microns. The granule size of the composition is in the range of 0.1 - 3.5 mm. The dispersion rate of the composition is 65%, the suspension rate is 50%, and the wettability is less than 30 seconds. Under accelerated storage conditions, the suspension rate of the composition is about 45%, the dispersion rate is 60%, and the wettability is 32 seconds.

[0134] B. Field study:

[0135] Experiment 1: To study the effect of the water-dispersible granule of "water-insoluble magnesium salt and water-insoluble iron salt" on peanut crops.

[0136] A field experiment on peanut variety BG1 was conducted in Jalgaon, Maharashtra to evaluate an embodiment of the composition of the present invention. The experiment adopted a randomized block design (RBD), with 7 treatment groups including an untreated control, replicated 4 times. The plot area for each treatment group was 35 square meters (7 meters x 5 meters). The experimental nutrient composition contained various individual iron salts, magnesium salts, and their combined water-dispersible granules (in different concentration ranges), as well as a specified dose of salts, which were applied as basal fertilizers at the time of sowing the peanut crop. The effective doses mentioned in the field experiment included the doses of elemental iron (Fe) and elemental magnesium (Mg).

[0137] The details of the experiment are as follows:

[0138] a) Experimental site: Jalgaon, Maharashtra

[0139] b) Crop: Peanut (BG-1)

[0140] c) Experimental season: Rabi season 2022

[0141] d) Experimental design: Randomized block design

[0142] e) Number of replications: 4

[0143] f) Number of treatment groups: 7

[0144] g) Plot area: 7 meters x 5 meters = 35 square meters

[0145] h) Application date: January 11, 2022

[0146] i) Sowing date: January 11, 2022

[0147] j) Application method: Basal fertilizer

[0148] k) Harvest date: April 16, 2022

[0149] l) Soil pH value: 7.3

[0150] Observations at harvest were recorded, and the average data are listed in Table 1 to enumerate the efficacy of the water-dispersible granules of "water-insoluble magnesium salts and water-insoluble iron salts" prepared according to the embodiments of the present invention.

[0151] Table 1:

[0152]

[0153]

[0154] * Days after DAA

[0155] * Synergistic effect

[0156] The selected water-insoluble magnesium salts and iron salts and their concentrations are for reference only and can be replaced with other water-insoluble magnesium salts and iron salts with different concentrations described in the present invention.

[0157] The definition of "synergistic effect" was defined by Colby S.R. in the article titled "Calculation of the synergistic and antagonistic responses of herbicide combinations", which was published in "Weeds", 1967, Volume 15, pages 20-22. The expected effect of a given combination of two active ingredients can be calculated as follows:

[0158] E = X + Y – (XY) / 100

[0159] Where,

[0160] E = the percentage of the expected effect after mixing two products X and Y at the specified doses.

[0161] X = the percentage of the effect observed for product A

[0162] Y = the percentage of the effect observed for product B

[0163] The synergistic factor (SF) is calculated using the Abbott formula (formula (2) (Abbott, 1925)).

[0164] SF = observed effect / expected effect

[0165] Where, SF > 1 indicates a synergistic response; SF < 1 indicates an antagonistic response; SF = 1 indicates an additive response.

[0166] When the observed percentage of the yield effect (E) of the combination is greater than the expected percentage, it can be inferred that the combination has a synergistic effect. When the observed percentage of the yield effect of the combination is equal to the expected percentage, it can be inferred that the combination only has an additive effect; when the observed percentage of the yield effect of the combination is lower than the expected percentage, it can be inferred that the combination has an antagonistic effect.

[0167] It can be seen from the data in Table 1 that the treatment groups T1, T4, T7, and T10 in the examples of the present invention showed a synergistic effect.

[0168] As can be seen from Table 1, the synergistic factors of treatment groups T1 and T4 in the embodiments of the present invention are 1.52 and 1.82 respectively, indicating that the WDG compositions of "iron oxide + magnesium silicate" and "iron carbonate + magnesium oxide" have a synergistic effect. The synergistic effect of the "water-insoluble iron salt and water-insoluble magnesium salt" in the form of WDG in the embodiments of the present invention can be observed from the yield of peanut kernels.

[0169] According to the data and calculations, the expected increases in the yield of peanut kernels for treatment groups T1 and T4 are 17.21% and 21.81% respectively. However, as can be clearly seen from Table 1 above, the yield increase of treatment group T4 (applying 40% iron carbonate and 20% magnesium oxide WDG) is 39.74%, while the yields of treatment group T5 (applying 40% iron carbonate WDG) and treatment group T6 (applying 20% magnesium oxide WDG) are only 8.97% and 14.10% respectively.

[0170] Therefore, compared with the treatment groups applying the active ingredients alone, treatment groups T1 and T4 applying the water-dispersible granule of the embodiments of the present invention showed a synergistic effect. The results are even more surprising because all treatment groups T1-T3 and T4-T6 used the same application doses of iron salts and magnesium salts, namely 453 g / ha of iron and 324 g / ha of magnesium, and 657 g / ha of iron and 411 g / ha of magnesium respectively.

[0171] Further, as can be seen from Table 1, compared with treatment groups T2-T3 and T5-T6 using iron salts and magnesium salts alone, treatment groups T1 and T14 using the composition of the embodiments of the present invention showed a surprising absorption rate of nutrients such as magnesium and iron even when these active ingredients were applied at the same application dose in each treatment group. Therefore, the combination of "water-insoluble magnesium salt and water-insoluble iron" applied in the form of water-dispersible granule in the embodiments of the present invention has a synergistic effect. Compared with the treatment of applying the active ingredients alone, its yield is surprisingly increased, and plant physiological parameters are also improved, such as the increase in plant height and the number of pods per plant.

[0172] In addition to the water-insoluble iron salts and magnesium salts listed in Table 1 above, other water-insoluble iron salts and magnesium salts described in this application showed a synergistic effect with the composition of the embodiments of the present invention within the concentration range required by the present invention. Therefore, the composition in the form of water-dispersible granule of the present invention was found to be a composition with high nutrient utilization efficiency.

[0173] Experiment 2: Study the effect of water-dispersible granule of "water-insoluble magnesium salt and water-insoluble iron salt" on pepper crops

[0174] The experiment was conducted in Kharif using a Randomized Block Design (RBD), with a total of 7 treatment groups, including an untreated control group, replicated 4 times. The plot area for each treatment group was 40 square meters (8 meters x 5 meters). The components evaluated included iron salts alone, magnesium salts alone, and combinations of iron salts and magnesium salts, where the application doses of iron salts and magnesium salts were the same in each treatment. The chili crops in the experimental field were planted according to good agricultural practices. The chili seedlings used in the study were planted at a row spacing of 75 cm and a plant spacing of 45 cm. The details of the experiment are as follows:

[0175] Details of the experiment

[0176] a) Experimental location: Nashik (MH)

[0177] b) Crop: Chili (variety: Kiran)

[0178] c) Experimental season: Kharif 2021

[0179] d) Experimental design: Randomized Block Design

[0180] e) Number of replications: 4

[0181] f) Number of treatment groups: 7

[0182] g) Plot area: 8 meters x 5 meters = 40 square meters

[0183] h) Application date: August 6, 2021

[0184] i) Application method: Target application to the root zone of each plant

[0185] j) Transplanting date: August 6, 2021

[0186] k) Harvest dates: February 14, 2022; February 25, 2022; March 4, 2022

[0187] The average data of all observations are listed in Table 2 to illustrate the effects of the combination of water-insoluble iron salts and water-insoluble magnesium salts in the form of water-dispersible granules according to the embodiments of the present invention on chili yield and other parameters.

[0188] Table 2:

[0189]

[0190]

[0191] From the data in Table 2, it can be seen that treatment groups T3 and T6 according to the embodiments of the present invention showed a synergistic effect.

[0192] Based on the data and calculations, the expected increases in chili pepper yields for treatment groups T3 and T6 were 16.47% and 11.12% respectively. However, as can be clearly seen from Table 2 above, for treatment group T3 applying 5% ferrous silicate (iron element content 1.64%) + 80% magnesium oxide (magnesium element content 48.2%) WDG according to the embodiments of the present invention, the increase in tomato yield was 27.86%, while for treatment group T1 applying 5% ferrous silicate WDG and treatment group T2 applying 80% magnesium oxide WDG, the increases were 6.07% and 11.07% respectively. Similarly, treatment group T6 according to the embodiments of the present invention showed better yields compared to the individual treatment groups T4 and T5.

[0193] Table 2 also shows that treatment groups T3 and T6 had the highest control rates for anthracnose (fungal disease) compared to treatment groups T1 - T2, T4 - T5, and T7. For example, the control rate of pests and diseases for treatment group T3 prepared according to the embodiments of the present invention was approximately 59%, while the control rates of diseases for treatment groups T1 and T2 were 27% and 30% respectively.

[0194] Therefore, it can be seen that compared to the individual treatment groups and the untreated control group, the water - dispersible granule preparation with the synergistic effect of the present invention has excellent efficacy in terms of yield and disease control, wherein the composition comprises fine particles with a size range of 0.1 micrometer - 30 micrometers.

[0195] Experiment 3: Evaluate the efficacy of "water - insoluble iron salts and water - insoluble magnesium salts" of different preparations in a commercial tomato crop field:

[0196] Field test method:

[0197] The experiment was carried out using a randomized block design (RBD) during the Kharif season, with 7 treatment groups including an untreated control, replicated 4 times. The plot area for each treatment group was 40 square meters (8m x 5m). The components evaluated included individual iron salts, magnesium salts, and different preparations including combinations of iron salts and magnesium salts, wherein the dosage of iron salts and magnesium salts was the same in each treatment group. Before the flowering stage of the tomato crop, the composition was applied by bending / siding. The tomato crops in the test field were planted according to good agricultural practices. Tomato seeds of the variety Abhinav were used in the study, with a planting spacing of 75 cm row spacing and 45 cm plant spacing.

[0198] The details of the experiment are as follows:

[0199] Details of the experiment

[0200] a) Test location: Anand, Gujarat

[0201] b) Crop: Tomato (variety: Abhinav)

[0202] c) Test season: Kharif season 2021

[0203] d) Test design: Randomized block design

[0204] e) Number of replications: 4

[0205] f) Number of treatment groups: 7

[0206] g) Plot area: 8 m x 5 m = 40 square meters

[0207] h) Application date: August 16, 2021

[0208] i) Application method: Target application to the root zone of each plant

[0209] j) Transplanting date: August 16, 2021

[0210] k) Harvesting dates: December 10, 2021; December 21, 2021; January 15, 2022

[0211] l) pH value: 7.5

[0212] Table 3:

[0213]

[0214]

[0215] SC - Suspension concentrate; WDG - Water dispersible granule

[0216] As can be clearly seen from Table 3 above, according to the embodiments of the present invention, treatment group T3 uses 10% iron oxide (iron element content 7.773%) + 52.5% magnesium carbonate (magnesium element content 15.13%) WDG, and the tomato yield increases by 42%. However, treatment group T1 using 10% iron oxide + 52.5% magnesium carbonate - SC (prior art) only increases the yield by 10%, treatment group T2 using 10% iron oxide + 52.5% magnesium carbonate powder increases the yield by 14.0%, and treatment group T4 using 10% iron oxide + 52.5% magnesium carbonate granule increases the yield by 13.60%. Based on the data and calculations with reference to treatment groups T5 - T6, the expected increase in fruit yield is 15.87%. Therefore, it can be seen that compared with the same treatment groups using powder compositions (i.e., treatment group T2), granule compositions (i.e., treatment group T4), and individual active ingredients (i.e., treatment groups T5 - T6), treatment group T3 of the WDG according to the present invention exhibits a synergistic effect despite the same application doses of iron and magnesium. In addition, treatment group T3 also shows a higher yield than treatment group T1 (prior art composition). Since the doses of iron and magnesium applied in all treatment groups from T1 to T6 are the same, i.e., 256.55 g / ha of iron and 499 g / ha of magnesium, the results are even more surprising.

[0217] Therefore, it is noteworthy that the "water-insoluble iron salt and water-insoluble magnesium salt" composition in the form of aqueous dispersion granules according to the embodiments of the present invention has a synergistic effect, and compared with other known formulation types, the yield is surprisingly increased, and the plant physiological parameters are improved.

[0218] Experiment 4: Evaluate the effect of particle size distribution in the iron oxide + magnesium oxide - WDG mixture on the eggplant yield.

[0219] Field experiments were carried out in West Bengal to observe the effect of iron oxide + magnesium oxide - WDG mixtures in different size ranges on the eggplant yield.

[0220] The experiment was carried out in the Rabi season (i.e., from January to April) using a randomized block design (RBD), with three treatment groups (including an untreated control group), repeated 7 times. The evaluated compositions included the iron salt WDG composition and the magnesium salt WDG composition of the present invention, which were applied to the soil after planting eggplant seedlings in the experimental field. The eggplant crops in the experimental field were planted according to good agricultural practices.

[0221] Experiment details

[0222] a) Experimental site: North 24 Parganas district, West Bengal

[0223] b) Crop: Eggplant (variety: Pusa purple round)

[0224] c) Experimental season: Rabi

[0225] d) Experimental design: Red loam soil experiment

[0226] e) Number of repetitions: 6 times

[0227] f) Number of treatment groups: 4 times

[0228] g) Plot area: 5 x 6 = 30 square meters

[0229] h) Sowing date: June 11, 2021

[0230] i) Application date: June 11, 2021

[0231] j) Application method: Root zone soil application

[0232] k) Crop variety: Pusa purple round

[0233] l) Harvest dates: November 10, 2021, November 20, 2021, December 1, 2021

[0234] m) Soil pH value: 6.8 - 7

[0235] Record the observations at harvest and list the average data in Table 4 to enumerate the efficacy of the water-dispersible granule containing "water-insoluble iron salt and water-insoluble magnesium salt" prepared according to the embodiments of the present invention.

[0236] Table 4:

[0237]

[0238]

[0239] From the data in Table 4, it can be seen that for treatment group T1 which applied the composition in the form of 30% iron oxide (elemental iron 20.98%) + 35% magnesium oxide (elemental magnesium 21.11%) WDG water-dispersible granules with a particle size in the range of 0.1 to 30 microns according to the embodiments of the present invention, compared with treatment group T2 (applied 30% iron oxide + 35% magnesium oxide WDG with a particle size in the range of 0.1 to 50 microns) and treatment group T3 (applied 230% iron oxide + 35% magnesium oxide WDG with a particle size in the range of 0.1 to 100 microns), the yield increased significantly. It can be observed that the eggplant yield of treatment group T1 increased astonishingly by 37.50%, while for treatment group T2 and T3, compared with the untreated control group, the yields increased by 20.83% and 17.50% respectively.

[0240] In addition, compared with treatment groups T2 and T3, treatment group T1 has a very high absorption rate of nutrients such as magnesium and iron. Therefore, compared with water-dispersible granule preparations with a larger size range, the water-dispersible granule preparation of the present invention shows more excellent efficacy in terms of yield and nutrient absorption, wherein the composition contains particles in the size range of 0.1 to 30 microns.

[0241] Experiment 5: Compare the effect of the composition of the present invention with a commercially available multi-nutrient water-soluble powder on corn crops:

[0242] The field experiment was carried out in a commercially cultivated corn field in Nashik, Maharashtra to compare the effect of the WDG composition composed of water-insoluble iron and magnesium salts and a commercially available water-soluble multi-nutrient powder on corn yield. The experiment was carried out in the Kharif season, using a randomized block design (RBD), with three treatment groups including an untreated control group. The composition of the present invention was applied at the specified dose and combined with drip irrigation.

[0243] The corn crops in the experimental field were planted according to good agricultural practices.

[0244] Experiment details

[0245] a) Experiment location: Nashik (MH)

[0246] b) Crop: Maize

[0247] c) Test season: Kharif season

[0248] d) Test design: Randomized block design

[0249] e) Number of replications: 7

[0250] f) Number of treatment groups: 3

[0251] g) Plot area: 8 m x 5 m = 40 square meters

[0252] h) Sowing date: June 7, 2021

[0253] i) Application date: June 17, 2021

[0254] j) Application method: Drip irrigation to soil

[0255] Table 5:

[0256]

[0257] It can be seen from treatment group T1 in Table 5 that the WDG composition prepared according to the embodiments of the present invention shows a higher yield compared to treatment group T2 (where the applied composition is a commercially available water-soluble multi-nutrient mixture) and the untreated plot. Compared with treatment group T2 (whose yield only increased by 8.1%), the yield of treatment group T1 increased by approximately 31.8%. Therefore, it can be concluded that although the application dose of treatment group T2 is higher, the combination of "water-insoluble iron salt and water-insoluble magnesium salt" in the form of WDG according to the embodiments of the present invention significantly improves the yield compared to the commercially available water-soluble multi-nutrient mixture.

[0258] Experiment 6: To study the efficacy of the composition of the present invention on cucumber crops.

[0259] A field experiment was conducted in Guntur, Andhra Pradesh to observe the effect of the composition in the form of a water-dispersible granule containing water-insoluble iron and water-insoluble magnesium salts. The experiment was carried out in the Kharif season using a randomized block design (RBD), with 5 treatment groups (including an untreated control) and 4 replications. The plot area for each treatment group was 30 square meters (6 m x 5 m). The test product compounds of the present invention (including various iron salts, magnesium salts and their combinations) were sprayed on the leaves at the early flowering stage in the form of a composition of water-dispersible granules with different concentration ranges and specified doses. The cucumber crops in the experimental field were planted according to good agricultural practices.

[0260] The details of the experiment are as follows:

[0261] a) Test location: Guntur, Andhra Pradesh

[0262] b) Crop: Cucumber (Variety: PAN 3451)

[0263] c) Test season: Kharif season 2021 (from July 2021 to November 2021)

[0264] d) Test design: Randomized block design

[0265] e) Number of replications: 4

[0266] f) Number of treatment groups: 5

[0267] g) Plot area: 5 x 6 = 30 square meters

[0268] h) Application date: August 25, 2021

[0269] i) Sowing date: July 6, 2021

[0270] j) Application method: Foliar spray (before flowering)

[0271] k) Harvest date: October 17, 2021

[0272] l) Soil pH value: 7.5

[0273] The flowering observations at 40 DAA were recorded, and the average data of fruit yield at harvest are listed in Table 6.

[0274] Table 6:

[0275]

[0276]

[0277] DAA* Days after application

[0278] As can be seen from the data in Table 6, compared with treatment group T2 (25% iron oxide WDG), treatment group T3 (35% magnesium oxide WDG), and treatment group T4 (25% iron oxide + 35% magnesium oxide SC), the treatment group T1 (25% iron oxide (elemental iron 17.48%) + 35% magnesium oxide (elemental magnesium 21.11%) WDG aqueous dispersible granule composition, with a size range of 0.1 micron to 30 microns) according to the embodiment of the present invention had a significantly increased flowering rate and a significantly increased yield. This clearly shows that foliar application of the composition of the present invention (treatment group T1) significantly increased the flowering of cucumbers compared with treatment group T2 (25% iron oxide WDG), treatment group T3 (35% magnesium oxide WDG), treatment group T4 (25% iron oxide + 35% magnesium oxide SC according to the teachings of JP2020125283), and the untreated group. Further observation revealed that by applying treatment group T1 according to the embodiment of the present invention, the shedding of cucumber fruits was significantly reduced, which in turn contributed to an increase in the number of fruits, thus significantly increasing the fruit yield, while the shedding of cucumber fruits observed when applying treatment groups T2 - T5 increased.

[0279] In addition, the increase in fruit yield observed in treatment group T1 was approximately 41.98%, while those in treatment groups T2, T3, and T4 were approximately 14.8%, 10.6%, and 20.56% respectively. Therefore, compared with other treatment groups, the aqueous dispersible granules of the present invention had more excellent effects in reducing flower and fruit drop and increasing yield when foliarly applied, wherein the particle size range of the composition was 0.1 micron to 30 microns.

[0280] Experiment 7: To study the effects of the composition of the present invention and traditional fertilization methods on nutrient uptake by cabbage crops.

[0281] In a greenhouse in Himmatnagar, Gujarat, Maharashtra, India, a pot experiment was conducted to compare the effects of the composition of the present invention and traditional fertilization methods on nutrient uptake.

[0282] The soil was analyzed before applying the treatment agent to evaluate the availability of nutrients, and the observed results were as follows:

[0283]

[0284] According to the soil surface area, the following test nutrient components were applied at the specified doses and applied to the topsoil of each treatment pot and thoroughly mixed with the soil to a depth of 5 cm. Thereafter, a 25-day-old cabbage seedling was planted in each pot. The cabbage seedlings in the 5 pots were cultivated according to GAP (Good Agricultural Practice) until harvest or full development. The details of the treatment groups are as follows:

[0285] The details of the experiment are as follows:

[0286] a) Test Site: Himatnagar, Gujarat

[0287] b) Crop: Cabbage (Swarna Poorna variety)

[0288] c) Test Season: Rabi (November 2021 - February 2022)

[0289] d) Test Design: Randomized Block Design, 5 pots per treatment

[0290] e) Number of Replications: 5

[0291] f) Number of Treatment Groups: 5

[0292] g) Pot Size: Top diameter 20 cm x Bottom diameter 15.5 cm x

[0293] Table 7:

[0294]

[0295]

[0296] BA * Before Fertilization

[0297] It can also be observed from Table 7 that compared with treatment group T2 applying water - soluble NPK fertilizer, treatment group T3 applying a composition containing water - soluble micronutrients (Nutrifast from Stanes company), and the untreated plot, treatment group T1 applying the WDG composition prepared according to the embodiments of the present invention shows a better nutrient absorption rate and also exhibits a better nutrient absorption rate.

[0298] It is worth noting that in treatment group T1, iron and magnesium are immediately absorbed by the crop together with other nutrients present in the soil, while in treatment groups T2, T3, and T4, the absorption of iron or magnesium is less. It is also observed that even when applying NPK and combinations of NPK with other trace elements (such as calcium, boron, manganese, etc.), even at higher doses, the absorption of iron and magnesium is not as significant as that of the composition of the present invention. In addition, it is observed that in treatment groups T2 - T4, due to the presence of phosphorus in the soil, phosphorus hinders the absorption of iron, thus interfering with the plant's absorption of iron, so the absorption of iron is low. However, it is observed that compared with treatment groups T2 - T4, treatment group T1 applying the water - dispersible granule (WDG) containing magnesium element and having a synergistic effect with iron element and a particle size of 0.1 to 30 microns prepared according to the embodiments of the present invention not only enhances the absorption of zinc but also enhances the absorption of other nutrient elements such as magnesium, manganese, boron, etc.

[0299] In addition, it was also observed that even when the soil was rich in nutrients, treatment groups T2 and T3 showed lower nutrient absorption rates despite the higher application rates. However, an increase in nutrient absorption was observed in the compositions of the present invention because the compositions created an environment suitable for nutrient absorption, adjusted the soil pH value, thereby helping to release the nutrients in the soil into the plants or crops. Treatment groups T2, T3, and T4 showed nutrient antagonism because the high phosphorus content in the acidic soil hindered the absorption of iron and magnesium. Therefore, it can be concluded that the compositions of the present invention not only promoted the absorption of essential nutrients such as magnesium and iron, but also helped to release trace elements and trace elements that could not be absorbed in the soil, enabling the plants to absorb them.

[0300] Therefore, it is noteworthy that the WDG composition of "water-insoluble iron salt and water-insoluble magnesium salt" according to the embodiments of the present invention can provide significantly higher utilization amounts of magnesium and iron in the size range of 0.1 micrometers to 30 micrometers even in the presence of NPK fertilizers, which does not occur when traditional fertilizers are applied alone.

[0301] In addition, the inventors of the present invention also tested the WDG composition of the present invention on other crops such as chili peppers and okra. It was found that the composition of the present invention can further enhance crop characteristics such as straw weight and plant height, and improve the nutritional value of the crops. In addition, such combinations can also help to increase crop yields, improve photosynthesis, increase chlorophyll content, and improve the nutrient absorption of the crops.

[0302] It has been observed that the compositions of the present invention exhibit enhanced, efficient, and excellent performance in the field. By using the compositions of the present invention, the application frequency or amount of nutrients, fertilizers, or pesticides can be minimized. In addition, compared with the existing known compositions, the compositions of the present invention exhibit surprisingly higher field efficacy at reduced application doses. The composition is very safe for both users and the environment. This novel composition helps to increase plant yields, balance the absorption of all nutrients, reduce leaf yellowing, and improve plant physiological parameters such as increasing roots, improving foliar growth, disease resistance, increasing crop greenness, thereby providing nutrient-rich crops.

[0303] In addition, various advantageous properties related to the compositions of the present invention include, but are not limited to, improved stability, improved toxicological and / or ecotoxicological behavior, improved crop characteristics (including crop yields, crop quality, and characteristics), and other advantages familiar to those skilled in the art.

[0304] As can be seen from the above, various modifications and variations can be made without departing from the true spirit and scope of the novel concept of the present invention. It should be understood that the present invention is not intended to limit or infer limitations on the specific embodiments shown.

Claims

1. A crop nutrient composition in the form of a water-dispersible granule, comprising a homogeneous mixture of the following components: At least one water-insoluble iron salt, iron complex or iron derivative, accounting for 1%-50% w / w of the total composition; At least one water-insoluble magnesium salt, magnesium complex or magnesium derivative, accounting for 5%-80% w / w of the total composition; At least one agrichemically acceptable excipient; Wherein, The content of elemental iron accounts for 0.01% - 50% w / w of the total composition; wherein, the content of elemental magnesium accounts for 0.1% - 50% w / w of the total composition; wherein, the composition comprises fine particles with a size range of 0.1 micrometers to 30 micrometers.

2. The composition according to claim 1, wherein, At least one water-insoluble iron salt includes at least one water-insoluble iron salt, iron complex or iron derivative, which includes at least one of the following: Iron Oxide, iron succinate, iron fumarate, iron hydroxide, ferrous oxide, Ferric Oxide, Ferroso Ferric Oxide, iron hydroxide, iron oxalate, iron saccharate, iron tartrate, ferrous hydroxide, iron phosphate, iron carbonate, iron silicate, iron carbonyl, iron sulfide, iron dichromate.

3. The composition according to claim 1, wherein, At least one water-insoluble magnesium salt includes at least one of magnesium molybdate, magnesium hydroxide, calcium magnesium phosphate, magnesium carbonate, magnesium aluminum silicate, calcium magnesium silicate, magnesium trisilicate, magnesium silicate, magnesium oxide, its complex or derivative.

4. The composition according to claim 1, wherein, The size range of the granule of the composition is 0.05 millimeters to 5.0 millimeters.

5. The composition according to claim 1, wherein, The composition comprises fine particles with a size range of 0.1 micrometers to 20 micrometers.

6. The composition according to claim 1, wherein, The composition comprises fine particles with a D50 diameter distribution of about 20 micrometers.

7. The composition according to claim 1, wherein, At least one agrichemically acceptable excipient is selected from one or more of wetting agents, surfactants, dispersants, disintegrants, emulsifiers, fillers or carriers or diluents, hydrocolloids, spreading agents, colorants, anti-caking agents, binders, buffers or pH regulators or neutralizing agents, thickeners, pigments, stabilizers, defoaming agents or antifoaming agents, anti-settling agents, penetrants, preservatives.

8. The composition according to claim 7, wherein, The composition comprises at least one surfactant.

9. The composition according to claim 7, wherein, At least one agrichemically acceptable excipient accounts for 0.01% - 94% w / w of the total composition.

10. The composition according to claim 1, wherein, The suspension rate of the composition is at least 30%.

11. A method for preparing the crop nutrient composition in the form of a water-dispersible granule according to claim 1, wherein, The method comprises: a. Grinding at least one water-insoluble iron salt, iron complex or iron derivative accounting for 1% - 50% of the total weight of the composition, at least one water-insoluble magnesium salt, magnesium complex or magnesium derivative accounting for 5% - 80% of the total weight of the composition, and at least one agrichemically acceptable excipient in water into a homogeneous mixture to obtain a slurry or a wet mixture; b. Drying the slurry or the wet mixture to obtain a composition in the form of water-dispersible granules; wherein, the content of elemental iron is 0.01% to 50% of the total weight of the composition, wherein, the content of elemental magnesium is 0.1% to 50% of the total weight of the composition, wherein, the composition comprises fine particles with a size range of 0.1 micrometers to 30 micrometers.

12. The composition according to claim 1, wherein, The composition is at least one of a fertilizer composition, a nutritional composition, a crop fortifier composition, a soil conditioner composition and a yield enhancer composition.

13. A method for improving plant health or yield, wherein, The method comprises treating at least one of plants, plant propagation materials, their locations or plant parts, seeds, seedlings or the surrounding soil with the composition in the form of water-dispersible granules as claimed in claim 1.

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