Fertilizer & Soil
Nitrogen Rate Calculator
Calculate nitrogen fertilizer needs based on yield goal, previous crop credits, and soil organic matter.
Input
Fill in the fields below, then click Calculate.
acres
bu/acre
Corn: 1.0-1.2, Wheat: 2.0-2.5
%
Each 1% OM contributes ~20 lbs N/acre
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Fill in the fields and click Calculate to see results.
Tips & Best Practices
- Credit nitrogen from previous legume crops to avoid over-application.
- Each 1% soil organic matter contributes approximately 20 lbs N/acre per year.
- Split nitrogen applications are more efficient than single pre-plant applications.
- Use the economic optimum nitrogen rate (EONR) rather than maximum yield rate.
- Consider in-season soil nitrate testing to adjust rates.