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How much nitrogen, phosphorus and potassium the harvest removes from the soil each season.
Pre-sizing and estimating tool: the results do not replace a design, calculation, or report signed by a qualified professional, nor verification against the applicable standards.
Amount of N, P₂O₅ and K₂O leaving the area with the harvested product.
Total N, P₂O₅ and K₂O exported, for different yields.
Drag the controls to simulate data different from what you entered (from 30% less to 30% more) and watch the result change instantly.
How much of each common fertilizer replaces the calculated export, without considering soil recovery. Typical contents; check the product label.
The calculation done in steps, with the values you entered.
The calculation memo gathers this page's inputs, results, equations, assumptions, and references, with fields for project, responsible person, and review. The full report also includes the charts and interpretations, in color. In the print window, choose Save as PDF.
Enter the area's yield and the N, P₂O₅, and K₂O content of the harvested product, in kg per tonne. The calculator shows how much of each nutrient leaves the area with the harvest.
Yield of 4.0 t/ha; illustrative contents of 54 kg/t of N, 12 kg/t of P₂O₅ and 20 kg/t of K₂O.
N = 4.0 × 54 = 216 kg/ha; P₂O₅ = 4.0 × 12 = 48 kg/ha; K₂O = 4.0 × 20 = 80 kg/ha. Total = 344 kg/ha.
It shows how much the soil loses with each harvest. Replacement helps keep fertility, but the fertilization rate should come from the soil analysis and the crop's needs.
Yes. Check the cultivar values or use analyses of the harvested product, when available.
Important 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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