Start / Soil and fertilization / Manure, composting and biogas
How much manure the herd produces and how many nutrients it carries to the area.
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.
N, P₂O₅, and K₂O reaching the area with the manure dose.
For the same herd, the dose drops as the area increases.
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 mineral fertilizer is equivalent to the available nutrients in the manure, per hectare and for the whole area. Available N based on the recovery you entered; P and K based on total content.
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 number of animals, the manure production per animal and per day, the production days in the year, the application area, and the N, P₂O₅, and K₂O contents of the manure. The calculator shows the dose per hectare and the nitrogen available in the first year.
60 animals, 10 kg of manure per day, 365 days, 30 ha area, illustrative contents of 5 kg/t of N, 3 kg/t of P₂O₅ and 4 kg/t of K₂O, and 50% N use efficiency.
Production = 60 × 10 × 365 ÷ 1,000 = 219 t/year. Dose = 219 ÷ 30 = 7.3 t/ha.
Total N = 7.3 × 5 = 36.5 kg/ha; available N = 36.5 × 0.5 = 18.3 kg/ha.
No. The fertilization recommendation depends on the soil analysis and the crop's needs; manure comes in as a nutrient source.
By laboratory analysis of a representative sample. Table values are only for estimates.
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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