Calculate how much fertilizer to apply for any crop. Enter your field size and recommended NPK dose to find exact quantities of urea, DAP, and MOP needed.
NPK stands for Nitrogen (N), Phosphorus (P), and Potassium (K) — the three primary macronutrients plants need. Fertilizer bags list NPK as percentages. Urea is 46-0-0, DAP is 18-46-0, MOP is 0-0-60.
Recommended nitrogen for wheat is 120 kg/ha = 48.6 kg N/acre. Since urea is 46% N: urea needed = 48.6/0.46 = 105.6 kg/acre ≈ 2 bags of 50 kg. Apply in split doses — half at sowing, half at first irrigation.
DAP (Di-Ammonium Phosphate) is 18-46-0 — it contains 18% nitrogen and 46% phosphorus (as P₂O₅). It is the most common phosphatic fertilizer in India. Apply at sowing for root development.
Both supply phosphorus. SSP (Single Super Phosphate) is 16% P₂O₅ and also contains 11% sulphur — useful for oilseeds and pulses. DAP is 46% P₂O₅ — more concentrated, less volume needed. DAP costs more per bag but less per kg of P.
MOP (Muriate of Potash) is potassium chloride — 0-0-60 fertilizer containing 60% K₂O. Applied at sowing. Potassium improves drought resistance, fruit quality, and disease resistance.
Split application means dividing the total fertilizer dose across multiple applications during the crop season. For nitrogen: apply 50% at sowing and 50% at the first irrigation (for wheat). Split application reduces nitrogen loss to leaching and volatilization.
Multiply the quantity of each fertilizer needed (kg) by the current price per kg. Indian market prices vary: Urea ≈ Rs 5.4/kg (subsidised), DAP ≈ Rs 27/kg, MOP ≈ Rs 17/kg. Total input cost helps plan crop economics.