Calculate how much nitrogen, phosphate (P₂O₅), and potash (K₂O) your crop needs — per hectare and field total. Based on IPNI + FAO nutrient removal tables. Free, no signup required.
Typical yield for Corn (Maize): 8–12 t/ha
From a standard soil test. Leave blank for conservative worst-case recommendation (assumes zero soil supply).
Fertilizer planning starts with a simple equation: nutrient demand = yield × removal rate. Each crop pulls a predictable amount of nitrogen, phosphorus, and potassium out of the soil per ton harvested — documented in the IPNI Crop Nutrient Removal Tables and FAO fertilizer bulletins. Subtract what your soil already provides (from a soil test), add a small buffer for losses, and you have a rational fertilizer rate.
Real fertilizer decisions depend on more than removal. Soil pH affects nutrient availability — phosphorus is locked out below pH 5.5 and above 7.5. Cation exchange capacity (CEC) determines how much K the soil can hold without leaching. Variable-rate technology (VRT) applies different rates in different zones of the same field based on satellite NDVI or soil-sampling grids, typically cutting total fertilizer use 10-25% without yield loss.
For field-specific recommendations that combine soil tests, satellite imagery, and your real-time weather, see WiseYield's farm budgeting + AI recommendation suite or read our glossary entries on NPK, variable rate application, and foliar feeding.
WiseYield combines soil tests, satellite NDVI, weather, and your field history to recommend zone-specific fertilizer rates — typically cutting input costs 10-25% without yield loss.
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