Compacted Calcium Pellets for Precision Soil Liming
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Solution Overview
Problem
Existing calcium-based soil liming products face issues with suboptimal dimensions, mechanical properties, and porosity, leading to clogging, inaccurate dosage, and reduced precision in precision farming, as well as water-based additives that reduce their effectiveness.
Innovation Solution
Compacted spheroidal/lens-shaped calcium-based pellets with a granule density of at least 1.6 g/cm³, high neutralization value, and improved mechanical strength, designed for precise dispersion using a distribution disk, ensuring accurate and efficient soil liming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If calcium-based soil liming products are used with conventional dimensions and properties, then they can be applied to soil, but they cause clogging, inaccurate dosage, and reduced precision in precision farming
Solution Approach 1:
The patent changes the physical parameters of the liming product by compacting calcium-based materials into pellets with specific density (≥1.6 g/cm³) and size (2-5 mm diameter). This compaction process transforms loose, problematic material into dense, handleable pellets that flow smoothly through distribution equipment without clogging, while enabling precise dosage control in precision farming applications
Solution Approach 2:
The patent creates a composite structure by compacting calcium-based materials (such as calcium oxide, calcium hydroxide, or calcium carbonate) into pellet form. This composite approach combines the chemical effectiveness of calcium-based liming agents with the mechanical advantages of dense, uniformly sized pellets, achieving both soil conditioning effectiveness and reliable handling properties
2Reliability
If calcium-based products with high neutralization value are used, then soil pH adjustment effectiveness is improved, but mechanical strength and handling properties deteriorate
Solution Approach 1:
The patent optimizes the density parameter of the liming product by compacting it to ≥1.6 g/cm³. This density increase simultaneously improves mechanical strength for better handling and maintains high neutralization value, resolving the contradiction between effectiveness and handleability
Solution Approach 2:
The patent employs spherical pellet geometry with controlled diameter (2-5 mm). This spheroidal shape provides uniform mechanical strength in all directions, prevents interlocking during handling, and ensures consistent flow characteristics, while the compacted structure maintains high neutralization capacity
3Ease of operation
If porous calcium-based products are used, then dispersibility in water is improved, but mechanical strength and structural integrity deteriorate
Solution Approach 1:
The patent optimizes the density parameter to ≥1.6 g/cm³, which represents an optimal balance point. This density provides sufficient structural integrity for handling while maintaining adequate porosity for water dispersibility, eliminating the need for water-based additives and preventing premature reaction
Solution Approach 2:
The spherical pellet structure with 2-5 mm diameter provides uniform stress distribution and consistent surface area-to-volume ratio. This geometry ensures predictable mechanical strength and uniform dispersibility without requiring high porosity, as the compacted spherical form naturally facilitates water penetration and dissolution at appropriate rates
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The compacted pellets provide enhanced mechanical strength, improved handling and dispersion performance, and increased precision in soil liming, reducing clogging and powder formation, while maintaining high neutralization capacity and dispersibility, thus optimizing soil pH adjustment in precision farming.
Implementation Method 1
The pellets are used as soil conditioning product, in particular as soil liming product, such as for deacidifying of the soil
Implementation Method 2
Reactivity of oxide-based products, such as lime, is much higher due to their chemical composition but more dependent on its capacity to react with water upon absorption of water and/or moisture, such as moisture from the atmosphere, followed by decomposition into smaller particles
Data Source
Figure 1~2A
Figure 2B~4A
Figure 4B~6
AI summary
The present invention is related to the use of compacted calcium- based granules, in particular pellets, in agriculture, in precision farming. The pellets are used as soil conditioning product, in particular as soil liming product, such as for deacidifying of the soil. The pellets are spheroidal/lens-shaped pellets comprising a source of calcium and optionally one or more additives. The pellets comprise at least 60 wt%, preferably 70 wt% of CaO, based on the total weight of the pellets. The pellets have an average size lower than 10 mm, measured by sieve analysis, and a granule density equal to or higher than 1.60 g/cm3, preferably equal to or higher than 1.70 g/cm3, measured by mercury picnometry. The present invention is further related to a precision farming method.