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See how much nitrogen, phosphorus and potassium the poultry litter supplies per hectare, and how much of it the crop uses in the first year.
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.
Technical responsibility. This calculator is under verification. The reference values and examples are hypothetical, to illustrate the calculation, and are not technical references. The user is responsible for the data entered, the choice of parameters, and the use of the results, and must validate them with a qualified professional before any decision, purchase, application, or construction work.
Total N, P₂O₅, and K₂O for doses of 5 to 25 t/ha, with the entered contents.
Nitrogen the crop uses in the first year for doses of 2 to 30 t/ha; the point is your dose.
Drag the controls to simulate data different from what you entered (from 30% less to 30% more) and watch the result change instantly.
Total nitrogen, phosphorus, and potassium, and the nitrogen used in the first year, for doses of 5 to 25 t/ha, with the contents entered.
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 manure dose per hectare and the N, P₂O₅, and K₂O contents from the material analysis. Also enter the first-year N efficiency, using your region's reference value. The calculator shows the total nutrients and what the crop should take up in the first year.
Dose of 8 t/ha, manure with 3.0% N, 2.5% P₂O₅ and 2.5% K₂O. First-year efficiency of 40% for N, 60% for P, and 80% for K.
Total N = 8,000 × 0.030 = 240 kg/ha. P₂O₅ = 200 kg/ha. K₂O = 200 kg/ha. N in the 1st year = 240 × 0.40 = 96 kg/ha. P₂O₅ used = 120 kg/ha. K₂O used = 160 kg/ha.
Because nutrient content varies a lot with batch age, reused litter and moisture. Using an average table value can get the dose wrong.
No. Part of the nitrogen is in organic form and is released only gradually. In the first year, only a fraction is used.
Generally, not completely. It mainly supplies P and K and part of the N. The mineral supplement provides the rest, based on the soil analysis and the crop.
Be careful of excess P and K in soils that are already rich. The dose should be balanced by the soil analysis so that nutrients do not build up.
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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