Start / Soil and fertilization
Lime need based on base saturation and NPK fertilization based on the chosen blend: fertilizer quantity, nutrients delivered, and the excess of the other nutrients.
Calculate the lime requirement by the base saturation method (V%), corrected for PRNT and incorporation depth.
Limestone by base saturationCalculate the NPK blend per hectare from the recommended doses, see which nutrient limits the dose and what is left over of each one.
Blend, nutrients delivered, and excessesCalculate the sum of bases, the CTC, base saturation (V%) and aluminium saturation (m%) from the soil analysis, and compare with the crop target.
V% and m% from Ca, Mg, K, H+Al and AlEnter the N, P₂O₅, and K₂O needs and the available blends with their contents and price. The calculator shows which one meets all the needs at the lowest cost per hectare.
Picks the blend that meets N, P, and K at the lowest costCalculate the blend of urea, MAP and potassium chloride that meets N, P₂O₅ and K₂O at the lowest cost per hectare, with the dose of each source and the nutrient surplus.
Urea, MAP and KCl at the lowest cost for N, P₂O₅ and K₂OCheck whether agricultural gypsum is indicated by the soil analysis (calcium at depth and aluminum saturation), and calculate the rate and cost.
Gypsum indicated by the soil analysis, and the doseCalculate the N, P₂O₅ and K₂O that an organic material supplies per hectare, with release efficiency, and what is still needed from mineral fertilizer.
Manure nutrients and mineral supplementEstimate corn topdressing N from the expected yield, subtracting the soil N and the N applied at planting, with N efficiency and urea equivalent.
Topdressing nitrogen and equivalent ureaCalculate how much nitrogen, phosphorus and potassium leaves the area with the harvest, based on yield and product content.
NPK removed from the area with the harvestConvert doses of P₂O₅, K₂O, CaO and MgO into the elements P, K, Ca and Mg, and calculate the amount of commercial product needed to deliver the dose.
P₂O₅ for P, K₂O for K and product doseImportant notice: the Agrocalcs tools make estimates and preliminary sizing based on the data entered and on published engineering methods. They do not replace a design, a calculation report or a report signed by a qualified professional (CREA/ART), nor verification against the applicable technical standards and legislation, such as the Regulatory Standards of the Ministry of Labor. Material and fuel properties vary: check with the manufacturer or with analyses of your process before deciding. By using the site, you agree to the Terms of Use.
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