Agricultural pellet and its applications

Abstract

To provide a novel agricultural pellet containing aerobic effective microorganisms and its applications.SOLUTION: One form of this invention is an agricultural pellet containing aerobic effective microorganisms and plant fibers.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a novel agricultural pellet and its use. [Background technology]

[0002] Efforts to use useful microorganisms in the agricultural field have been made for a long time. In recent years, in the name of sustainable agriculture, there has been a growing trend toward agriculture with reduced use of chemical pesticides and chemical fertilizers, and the use of useful microorganisms in the agricultural field has attracted more attention (Non-Patent Document 1, etc.). In the agricultural field, useful microorganisms are generally distributed and used as liquid agents containing useful microorganisms. Liquid agents have various advantages, such as the fact that storage space can be reduced if they are stored as concentrated liquids, that they can be applied in conjunction with irrigation, and that they can be easily applied to hydroponic cultivation. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] JSTnews September 2018 (Published: September 3, 2018) Summary of the Invention [Problem to be solved by the invention]

[0004] By the way, when a liquid agent containing useful microorganisms is applied to soil, etc., the useful microorganisms may grow and settle depending on the soil environment, and the effect may be maintained for a long time. However, in many cases, the effect is temporary, and new application is often required within a relatively short period of time.

[0005] In other words, with regard to the application of useful microorganisms in the agricultural field, there is currently a great deal of room for improvement in terms of sustaining the effects of the useful microorganisms after application to soil or the like.

[0006] One aspect of the present invention has been made in consideration of the above problems, and has an object to provide novel agricultural pellets containing aerobic useful microorganisms, and uses thereof. [Means for solving the problem]

[0007] The present inventors have conducted extensive research into the problem of improving the ease of handling of useful microorganisms while maintaining the effect of their application. As a result, they have found that the problem can be solved by adopting a method of pelleting aerobic useful microorganisms together with a specified material, and have arrived at the present invention. That is, in order to solve the above problems, the present invention provides, for example, the following aspects. 1) Agricultural pellets containing aerobic beneficial microorganisms and plant fiber. 2) Agricultural pellets according to 1), wherein the plant fibers do not contain woody matter. 3) The agricultural pellet according to 1) or 2), wherein the plant fiber is a mixture of at least two types. 4) The agricultural pellet according to 3), wherein the plant fiber is a mixture of at least two or more types selected from the group consisting of leaves, bark, palm fiber, and peat. 5) The agricultural pellet according to any one of 1) to 4), which contains an adhesive component derived from a plant. 6) The agricultural pellet according to 5), wherein the plant-derived adhesive component is starch. 7) The agricultural pellet according to any one of 1) to 6), wherein the aerobic useful microorganisms are a bacterial group of useful microorganisms consisting of a plurality of useful microorganisms. 8) The agricultural pellet according to any one of 1) to 7), which is at least one of a soil improving material, a plant growth regulating material, a bacteriostatic material, and a taste improving material. 9) A method for producing agricultural pellets according to any one of 1) to 8) above, comprising the steps of: mixing a liquid agent containing aerobic beneficial microorganisms with plant fibers; obtaining pellet-shaped solids of a predetermined size from the mixture; and drying the solids to obtain agricultural pellets. Effect of the Invention

[0008] According to one aspect of the present invention, it is possible to provide novel agricultural pellets containing aerobic useful microorganisms, which have excellent durability of effect after application, and uses thereof. [Brief description of the drawings]

[0009] [Figure 1] FIG. 13 is a diagram showing results according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] [1. Agricultural pellets] (Outline of agricultural pellets and an example of their effects) An agricultural pellet according to one embodiment of the present invention is a pellet containing aerobic useful microorganisms and plant fibers. The agricultural pellet exhibits at least one effect, preferably all effects, selected from the group consisting of 1) easy storage of useful microorganisms, 2) excellent handling properties, and 3) long-term effect after application. The agricultural pellet according to one embodiment of the present invention may further provide a plant activation effect, bacteriostatic effect, etc. that is not found in a liquid formulation of aerobic useful microorganisms, or may provide a plant activation effect, bacteriostatic effect, etc. that is enhanced compared to a liquid formulation of aerobic useful microorganisms.

[0011] (useful aerobic microorganisms) Examples of useful aerobic microorganisms contained in agricultural pellets include actinomycetes, lactic acid bacteria, fluorescent Pseudomonas bacteria, nitrogen fixing bacteria, photosynthetic bacteria, etc., but are not limited to these useful microorganisms. These useful microorganisms may be useful aerobic microorganisms contained in agricultural liquid agents such as plant activators. A specific example is the useful aerobic microorganisms contained in Aquatic Bio (registered trademark) Alpha. Aquatic Bio (registered trademark) Alpha contains aerobic photosynthetic bacteria and multiple types of aerobic nitrogen fixing bacteria. Aquatic Bio (registered trademark) Alpha is a plant activator manufactured by Sanshin Co., Ltd. and sold by Miyazawa Shoten Co., Ltd., and is available to anyone (purchased).

[0012] The aerobic beneficial microorganisms contained in the agricultural pellets are preferably a bacterial colony of beneficial microorganisms consisting of a plurality of beneficial microorganisms, and in one example, a bacterial colony of beneficial microorganisms consisting of 2 or more, 3 or more, 5 or more, 7 or more, or 10 or more types of beneficial microorganisms. Aquatic Bio (registered trademark) Alpha contains a bacterial colony of beneficial microorganisms consisting of at least 3 types of aerobic beneficial microorganisms. Aquatic Bio (registered trademark) Alpha contains fulvic acid and water in addition to the bacterial colony of beneficial microorganisms.

[0013] (Plant Fiber) The agricultural pellets contain plant fibers. The plant fibers become a skeleton for maintaining the shape of the agricultural pellets by intertwining with each other. The plant fibers can also serve as nutrients for useful microorganisms. In a preferred embodiment, the plant fibers are water-insoluble. If the plant fibers are water-insoluble, when the agricultural pellets absorb water, they will maintain a certain shape in a swollen state for a certain period of time. This allows water and air to penetrate into the agricultural pellets, which is thought to break the dormancy of the useful microorganisms. That is, in dry agricultural pellets (before application, etc.), the useful microorganisms are in a dormant state, making them suitable for storage, while after application of the agricultural pellets, the agricultural pellets absorb water due to rainfall or irrigation, and the useful microorganisms that come into contact with water and air are activated. In addition, in a preferred embodiment, the plant fibers do not contain wood. If the plant fibers contain wood, the adhesive action of lignin can produce fairly strong pellets (such as wood pellets for fuel). If the pellets are too strong, they will be difficult to absorb water and difficult to swell, which may make it difficult for water and air to penetrate into the pellets. Similarly, inorganic materials such as zeolite and materials obtained by carbonizing organic matter are hard and difficult to swell even when they absorb water, so in this embodiment, they are not preferable as carriers for agricultural pellets.

[0014] The plant fiber contained in the agricultural pellets may be one type, but may be preferably a mixture of at least two or more types. If the plant fiber is a mixture of at least two types, there are advantages such as 1) the shape of the agricultural pellets gradually disintegrates over time, and 2) nutrients for useful microorganisms can be gradually supplied. The plant fiber is not particularly limited, but may be, for example, plant fiber derived from leaves such as leaf mold, plant fiber derived from bark such as bark compost and bark chips, coconut fiber (e.g., coconut shell fiber, coconut chips, etc.), and peat material (e.g., peat moss, peat, etc.), and may be more preferably a mixture of at least two or more types selected from these groups. The plant fiber may preferably contain at least plant fiber derived from leaves such as leaf mold. In addition, the plant fiber may be particularly preferably a mixture of all of plant fiber derived from leaves, plant fiber derived from bark, coconut fiber, and peat material.

[0015] (adhesive component) Although agricultural pellets can maintain a certain shape due to the entanglement of plant fibers, in a preferred embodiment, the plant fibers do not contain woody parts, and the adhesive action of lignin cannot be utilized. Therefore, agricultural pellets preferably contain an adhesive component. The adhesive component is preferably derived from a plant, and more preferably at least one water-soluble adhesive component selected from the group consisting of starch, pectin, cellulose, and hemicellulose. As the adhesive component, starch such as konjac starch, potato starch, and corn starch may be more preferable, and konjac starch may be particularly preferable.

[0016] (shape, size, moisture content, etc.) The shape of the agricultural pellets is not particularly limited, but may be, for example, a columnar shape such as a cylindrical shape, a triangular prism shape, or a square prism shape. The size of the agricultural pellets is not particularly limited, but for example, when the shape is columnar, the height is within a range of 5 mm to 25 mm, and the maximum width (diameter in the case of a cylinder) is within a range of 2 mm to 25 mm. The height of the agricultural pellets may preferably be within a range of 5 mm to 15 mm. The maximum width of the agricultural pellets may preferably be within a range of 2 mm to 10 mm, and more preferably be within a range of 2 mm to 5 mm. The moisture content of the agricultural pellets is, for example, 30% or less, 10% or less, 5% or less, or 1% or less. The lower the moisture content, the better the handling properties and storage properties of the agricultural pellets.

[0017] (others) The agricultural pellets may contain inorganic or organic fertilizer components (excluding the above-mentioned plant fibers) and / or agricultural chemicals, but in a preferred embodiment, they do not contain inorganic or organic fertilizer components (excluding the above-mentioned plant fibers) or agricultural chemicals. In a preferred embodiment, the agricultural pellets substantially contain only aerobic beneficial microorganisms, plant fibers, and adhesive components, or substantially contain only aerobic beneficial microorganisms, plant fibers, adhesive components, and fulvic acid.

[0018] 2. Manufacturing method of agricultural pellets The agricultural pellets described in the above section [1. Agricultural pellets] are produced, for example, by a production method including the following steps (1) to (3). A step (1) of mixing aerobic beneficial microorganisms with plant fibers; (2) obtaining pellet-shaped solids of a predetermined size from the resulting mixture; and The resulting solid is dried to obtain agricultural pellets (3).

[0019] (Regarding step (1)) In step (1), aerobic useful microorganisms, plant fibers, and an adhesive component used as necessary are mixed to obtain a mixture. The order in which these are mixed is not particularly limited. Water is also added when mixing, but for example, when a liquid agent containing aerobic useful microorganisms (a concept that includes the original solution and a diluted solution of the original solution) is used as a raw material, it may not be necessary to add water separately.

[0020] The mixing ratio (weight ratio) of the "aerobic useful microorganisms", the "plant fiber", and the "adhesive component" used as necessary is not particularly limited as long as it can be processed into a pellet shape, but the volume (liters) of the liquid agent of the aerobic useful microorganisms is in the range of 1 to 20, more preferably in the range of 1 to 10, or in the range of 1 to 5, with the volume (liters) of the plant fiber being 100. The liquid agent of the useful microorganisms may be diluted, for example, 500 times, 400 times, 300 times, 200 times, 100 times, 50 times, 40 times, 30 times, 20 times, or 10 times, depending on the concentration of the original solution. In addition, the volume (liters) of the plant fiber is 100, and the volume (liters) of the adhesive component is in the range of 1 to 20 or 15, more preferably in the range of 3 to 15, and even more preferably in the range of 3 to 12. This mixing ratio can affect the ease of extruding the pellet-like solid material in step (2) and the ease of drying the pellet-like solid material in step (3).

[0021] In step (1), a more uniform mixture of aerobic beneficial microorganisms, plant fibers, and an adhesive component, if necessary, is obtained using a stirrer or the like. The temperature at which step (1) is performed is, for example, room temperature.

[0022] (Regarding step (2)) In step (2), pellet-shaped solids of a predetermined size are obtained from the mixture obtained in step (1). In step (2), for example, the mixture obtained in step (1) is fed into a pelletizer and extruded into pellet-shaped solids of a predetermined size. The temperature at which step (2) is performed is, for example, room temperature.

[0023] (Regarding step (3)) In step (3), the solid obtained in step (2) is dried to obtain agricultural pellets. In order not to impair the activity of the useful microorganisms, the solid may be preferably dried at, for example, 100°C or less, and more preferably at 80°C or less (the lower limit of the temperature is not particularly limited, but is, for example, room temperature or higher). The solid may be dried using a dryer (such as a hot air dryer), but may be more preferably dried naturally in the sun. Through step (3), agricultural pellets with reduced moisture content are obtained. The moisture content of the obtained agricultural pellets is, for example, 30% or less, 10% or less, 5% or less, or 1% or less.

[0024] (Other processes) A primary fermentation step may be provided between step (2) and step (3). In the primary fermentation step, the pellet-like solid material obtained in step (2) is left to stand in an open storage bag or the like to distribute and allow the beneficial microorganisms to spread throughout the solid material. The agricultural pellets obtained in step (3) are weighed and bagged for shipping.

[0025] [3. How to use agricultural pellets] The agricultural pellets described in the above section [1. Agricultural pellets] are used, for example, as soil improvement materials, plant growth regulators, antibacterial materials, or taste improvers. When the agricultural pellets are made from Aquatic Bio (registered trademark) Alpha, the agricultural pellets also exhibit the same effects as Aquatic Bio (registered trademark) Alpha. The same effects as Aquatic Bio (registered trademark) Alpha include, for example, the promotion of plant root growth, the activation of the plant's above-ground plant vigor, the improvement of taste, the improvement of yield, the inhibitory effect against nematode damage (e.g., root-knot nematodes, etc.), and the inhibitory effect against diseases caused by filamentous fungi (e.g., Fusarium, Phytophthora, Phomopsis, Colletotrichum, etc.), but are not limited thereto.

[0026] The timing of application of agricultural pellets is not particularly limited, and examples thereof include the time of disease occurrence, before sowing, during seedling raising, before planting seedlings, after planting seedlings, and any timing during the growth stage of a plant. The method of application of agricultural pellets is not particularly limited, and examples thereof include a method of application to the surface of soil or soil substitute, and a method of application in soil or soil substitute (for example, plowing into the entire soil before planting seedlings or before sowing; application in a planting hole for planting seedlings; application in a hole dug around a plant).

[0027] The amount of agricultural pellets to be applied is not particularly limited, but for example, when they are plowed into the entire soil, the amount of agricultural pellets to be applied per tan of farmland is about 100 to 200 L. When they are applied in planting holes, the amount of agricultural pellets to be applied per planting hole is about 30 to 45 ml.

[0028] Plants to which agricultural pellets can be applied are not particularly limited, but include Solanaceae crops (vegetables) such as tomatoes, eggplants, and chili peppers (including bell peppers); Cucurbitaceae crops (fruit vegetables) such as cucumbers, watermelons, and melons; Rosaceae crops (fruit vegetables, flowering trees, and fruits) such as strawberries, roses, and pears; Brassicaceae crops (vegetables) such as mizuna; basil; sweet potatoes; cyclamen; carnations; hydrangeas; and the like. EXAMPLES

[0029] [Example 1: Production of agricultural pellets, preservation properties, etc.] An embodiment of the present invention will be described below.

[0030] <Preliminary test: Group of beneficial microorganisms contained in Suibio (registered trademark) Alpha> In order to isolate the bacterial strains contained in the aquatic biomass, we attempted to isolate the bacterial strains from a 100-fold diluted solution of the aquatic biomass by dilution plate method. The 100-fold diluted solution of the aquatic biomass was diluted 10 times further with sterilized 0.7% saline. 3 , 10 4 , 10 5The samples were serially diluted up to 1:100 and 100 μl of each dilution was applied to a 100-fold diluted normal bouillon agar medium. Three plates were prepared for each dilution step of the aquatic biota.

[0031] Plates coated with each diluted solution of Aquatic Bio were cultured at 25°C for 7 days, and the number of colonies was counted and the morphological characteristics of the main colonies were recorded. Three main colony types were confirmed, and 2 to 3 strains were isolated and purified from each type. Since the method for isolating the strains was a method for isolating aerobic bacteria, it was found that Aquatic Bio (registered trademark) Alpha contains aerobic bacteria. In addition, the base sequence of the 16S rRNA of the purified strain was compared with the base sequence of the 16S rRNA of known bacteria, and it was found that Aquatic Bio (registered trademark) Alpha contains some types of photosynthetic bacteria and multiple types of nitrogen fixing bacteria.

[0032] <1. Manufacturing of agricultural pellets> At room temperature, 0.25 to 1 liter of a 50-fold diluted solution of Aquatic Bio (registered trademark) Alpha was mixed with 3 to 10 liters of leaf mold (collected from an outdoor forest field), 5 to 15 liters of bark compost, 8 to 20 liters of European peat, 8 to 20 liters of coconut fiber (a mixture of coconut shell fiber and coconut chips), and 1 to 4 liters of konjac flying powder, and the mixture was stirred uniformly with a stirrer to obtain a mixture.

[0033] The mixture was then put into a pelletizer at room temperature to extrude pellets of a given size (cylindrical shape with a height of 10-12 mm and a width (diameter) of 5-8 mm). All of the pellets were placed in an open storage bag or the like at room temperature for about 7-10 days to allow the beneficial microorganisms to circulate and become familiar with the entire solid.

[0034] The solid was then naturally dried in the sun to obtain agricultural pellets. The moisture content of the obtained agricultural pellets was approximately 30% or less.

[0035] <2. Long-term storage of agricultural pellets> The agricultural pellets obtained above were packed in a plastic bag for storage, sealed, and stored at room temperature. After about 12 months of storage, the plastic bag was opened, and the strawberries were planted in a field and agricultural pellets were applied to the soil surface around the strawberries. The strawberries that had agricultural pellets applied showed better growth than those that had not been applied with agricultural pellets.

[0036] <3. Durability of the effects of agricultural pellets> The duration of the effect of the agricultural pellets obtained above was observed when they were applied to the soil surface and when they were applied in the soil. The presence or absence of the effect of application was determined by comparing the growth of strawberries planted in a field with a control where no agricultural pellets were applied. When applied to the soil surface, the effect lasted for about 2 months, and when applied in the soil, the effect lasted for about 6 months. When a 1000-fold diluted solution of Aquatic Bio (registered trademark) Alpha was applied, the effect lasted for about 14 days, so it can be said that the effect was significantly sustained by pelleting. The application amount of bacteria per unit area was adjusted to be approximately the same when the agricultural pellets were applied and when the diluted solution of Aquatic Bio Alpha was applied.

[0037] Example 2: Effect of heat treatment The production of agricultural pellets may involve heat treatment during the drying process, etc. The following experiment was conducted to see how much the agricultural pellets made using Suiseibio (registered trademark) Alpha are affected by heat treatment.

[0038] The agricultural pellets obtained in Example 1 were placed in a heater and dried at 60°C or 80°C for 10 minutes. After drying, 40 liters of sterilized water was added to 10 g of actual weight, and the pellets were shaken back and forth for 30 minutes, and then diluted 10 times, 100 times, and 1000 times with sterilized water. A control group was also prepared without heat treatment and diluted in the same manner. Then, a pathogen (Strawberry yellows fungus) was inoculated into the center of the petri dish, and 20 μl of the pellet suspension diluted in each step was dropped around it, and the mixture was cultured at 25°C for 4 days, and the presence and size of inhibition zones were measured. The medium placed in the petri dish was a potato decoction-glucose agar (PDA) medium diluted 10 times. Each test was performed in duplicate, and the same experiment was repeated three times for reproducibility, and the average colony size after 4 days is shown in Figure 1. At each dilution stage in Figure 1, the left side shows the results for the control group, the middle shows the results for agricultural pellets dried at 60°C, and the right side shows the results for agricultural pellets dried at 80°C.

[0039] Example 3: Effect of plant fiber type on agricultural pellets <1. The effect of the selection of leaf mold on agricultural pellets (1)> 1.Test pathogen 1) Pythium aphanidearmatuma MAFF 241938 2) Seedling damping-off fungus (Rhizoctonia solani MAFF 242987) 3) Strawberry chlorosis fungus (Fusarium oxysporum f. sp. fragariae MAFF305557) 4) Black spot root rot fungus (Monosporascus cannonballus MAFF305550) 5) Phomopsis fungus (Cucurbit wilt symptoms Phomopsis sclerotioides MAFF243275) 6) Sweet potato root rot fungus (Diaporthe destruens MAFF246953).

[0040] 2. Experimental system 5 g of pellets from Company A and Company B were taken, mixed with 45 ml of sterilized water, and shaken back and forth for 1 hour to prepare a primary dilution (10-fold dilution). This was further diluted 100 to 1000 times. The test pathogen was inoculated into the center of a petri dish, and 20 μl of the pellet suspension diluted in each step was dropped around it to evaluate the inhibitory effect on the test pathogen. The medium placed in the petri dish was a 10-fold diluted potato decoction-glucose agar (PDA) medium. The culture was carried out at 25°C for 2 to 4 days, and the presence or absence of an inhibitory effect was judged from the growth rate of the test pathogen. A clear inhibitory effect was indicated as ◯, and a slight inhibitory effect was indicated as △. The same experiment was repeated three times to determine reproducibility.

[0041] 3.Results There was a clear difference in antibacterial activity against Pythium bacteria between pellets made by Company A and pellets made by Company B. There was also a slight difference in antibacterial activity against black spot root rot bacteria and root rot bacteria between pellets made by Company A and pellets made by Company B. The main difference between pellets made by Company A and pellets made by Company B is the origin of the leaf mold used, so it is assumed that the type of plant fiber (leaf mold) may affect the activity of agricultural pellets. It is also noteworthy that both pellets made by Company A and pellets made by Company B show antibacterial activity against seedling damping-off bacteria (Rhizoctonia solani), which is difficult to show antibacterial activity with Aquatic Bio (registered trademark) Alpha. [Table 1]

[0042] <2. The effect of the selection of leaf mold on agricultural pellets (2)> 1.Test pathogen 1) Strawberry anthracnose fungus (Colletotrichum acutatum) 2) Seedling damping-off fungus (Rhizoctonia solani) 3) Strawberry chlorosis fungus (Fusarium oxysporum f. sp. fragariae) 4) Black spot root rot fungus (Monosporascus cannonballus MAFF305550) 5) Phomopsis fungus (cause of cucurbit wilt symptoms) 6) Phytophthora nicotianae, the cause of strawberry blight.

[0043] 2. Experimental system 10 g of pellets (1) manufactured by Company C (cylindrical shape, 11 mm high x 6 mm wide (diameter)), pellets (2) manufactured by Company C (cylindrical shape, 11 mm high x 2 mm wide (diameter)), and pellets (cylindrical shape, 11 mm high x 5 mm wide (diameter)) manufactured by Company D were taken, mixed with 40 ml of sterilized water, and shaken back and forth for 30 minutes to prepare a primary dilution solution. This primary dilution solution was diluted 1:1, and then diluted 1:10, 1:100, and 1:1000 with sterilized water. The test pathogen was inoculated into the center of a petri dish, and 20 μl of the pellet suspension diluted in each step was dropped around it to evaluate the inhibitory effect on the test pathogen. The medium placed in the petri dish was a 10-fold diluted potato decoction-glucose agar (PDA) medium. The culture was carried out at 25°C for 2 to 4 days, and the presence or absence of an inhibitory effect was judged from the growth rate of the test pathogen. It should be noted that companies C and D are different manufacturers from the previously mentioned companies A and B. The main differences between pellets made by company C and pellets made by company D are the origin of the leaf mold they use and their size.

[0044] 3.Results The test was conducted twice, and all pellets showed antibacterial activity against the strawberry anthracnose fungus, the strawberry yellows fungus, the Phomopsis fungus, and the strawberry Phytophthora infestans. On the other hand, the pellets manufactured by Company D showed antibacterial activity against the Cucurbitaceae black spot root rot fungus and the seedling damping-off fungus. [Industrial Applicability]

[0045] The present invention can be widely used in the agricultural field.

Claims

1. An agricultural pellet comprising aerobic beneficial microorganisms and plant fiber.

2. 2. The agricultural pellet according to claim 1, wherein the plant fibers do not include woody matter.

3. 3. The agricultural pellet according to claim 1 or 2, wherein the plant fiber is a mixture of at least two types.

4. 4. The agricultural pellet according to claim 3, wherein the plant fiber is a mixture of at least two or more types selected from the group consisting of leaves, bark, palm fiber, and peat.

5. 3. The agricultural pellet according to claim 1 or 2, comprising an adhesive component of plant origin.

6. 6. The agricultural pellet according to claim 5, wherein the adhesive component derived from a plant is starch.

7. 3. The agricultural pellet according to claim 1 or 2, wherein the aerobic beneficial microorganisms are a group of beneficial microorganisms consisting of a plurality of beneficial microorganisms.

8. 3. The agricultural pellet according to claim 1 or 2, which is at least any one of a soil improving material, a plant growth regulating material, a bacteriostatic material, and a taste improving material.

9. A method for producing agricultural pellets according to claim 1 or 2, A step of mixing a liquid agent containing aerobic beneficial microorganisms with plant fibers; obtaining pellet-shaped solids of a predetermined size from the resulting mixture; and drying the resulting solid to obtain agricultural pellets; A manufacturing method comprising:

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