NPK Soil Estimator
NPK Fertilizer Calculator
Formulate optimal fertilizer blending rates based on soil chemistry, organic carbon, and target crop deficits.
Soil Organic Carbon (SOC)1.80%
Low (< 1.2%)Optimal (1.5% - 2.5%)High (> 2.5%)
Current Soil Nitrogen (N)25 ppm
Soil pH6.5
AcidicNeutralAlkaline
Nutrient Recommendations
Nitrogen (N)143kg / ha
Phosphorus (P)70kg / ha
Potassium (K)90kg / ha
Formulated Blend Requirements (10 Ha)
Urea (46% N)Supplies remaining Nitrogen
2,520 kg (51 bags)DAP (18% N, 46% P₂O₅)Supplies Phosphorus & partial Nitrogen
1,520 kg (31 bags)Muriate of Potash (60% K₂O)Supplies Potassium
1,500 kg (30 bags)Estimated Fertilizer Budget$4,031
Scientific Reference: Formulas are modeled from the FAO Land & Water development nutrient indices and the HWSD Soil Suitability index to optimize fertilizer assimilation thresholds.