Calculate N-P-K fertilizer requirements based on target yield, crop nutrient needs, and fertilizer efficiency.
Get precise N-P-K fertilizer recommendations based on your target yield, crop nutrient requirements, and fertilizer efficiency. Calculate compound fertilizer amount plus urea and potassium supplements. Optimize nutrient application, reduce waste, and lower input costs.
You spread 200 kg of 15-15-15 per hectare and wondered why corn leaves turned yellow at tasseling. The compound fertilizer gave equal N, P, and K, but corn needs twice as much nitrogen as phosphorus. You ended up with excess P and deficient N. This calculator tells you exactly how much compound plus supplemental urea to apply.
Enter your target yield in tons per hectare, the N, P2O5, and K2O requirements per ton of yield (found in crop nutrient guides), the nutrient percentage of your fertilizer, and expected application efficiency. Click calculate to see total nutrient needs and fertilizer amount.
The fertilizer calculator determines the exact amount of N-P-K fertilizer needed per hectare based on your target yield, crop nutrient requirements, fertilizer nutrient content, and application efficiency. Proper fertilization maximizes yield while minimizing nutrient waste and environmental impact.
A: Fertilizer use efficiency is the percentage of applied nutrients that the crop actually absorbs. Nitrogen efficiency is typically 50-70%, phosphorus 20-40%, potassium 60-80%. Split applications and proper timing improve efficiency.
A: Compound fertilizers (like 15-15-15) are convenient but may not match your exact nutrient ratio. Calculate each nutrient separately and use the fertilizer that requires the least total amount, then supplement with single-nutrient fertilizers if needed.
A: Soil testing should be done every 2-3 years for established fields, and annually for high-value crops or fields with known nutrient deficiencies. Take representative samples from 0-20cm depth for most crops.