Maize Fertilizer Calculator
Calculate urea, DAP and MOP for grain maize from the recommended N-P₂O₅-K₂O dose, with the nitrogen split across knee-high and tasseling stages.
The knee-high (V6–V8) dose matters most — maize sets its ear size then. Delay or skip it and yield is capped no matter what you apply later.
Indicative planning figures based on published research averages. Local soil tests, varieties and weather change actual requirements — confirm with your agronomist or extension officer.
Farmers and agronomists rely on the free Maize Fertilizer Calculator for accurate, instant results in the field — no spreadsheet, no sign-up, and it works offline.
About Maize Fertilizer Calculator
Hybrid grain maize is a heavy nitrogen feeder, fertilized at roughly 150:75:40 kg/ha N-P₂O₅-K₂O with the nitrogen split across basal, knee-high (V6) and tasseling stages. This calculator adjusts the dose for your soil test, scales it to your field and converts it into urea, DAP and MOP.
How to use Maize Fertilizer Calculator
- 1Enter your field details and any soil-test values you have.
- 2Read the recommendation, converted into practical quantities.
- 3Follow the timing/application guidance shown with the result.
Why use Maize Fertilizer Calculator?
- ✓Based on standard ICAR / soil-science recommendations
- ✓Adjustable to your own soil test and field size
- ✓Results in real products and bags you can take to the dealer
- ✓Free, instant and fully in-browser
Frequently asked questions
What is the fertilizer dose for hybrid maize?+
About 150:75:40 kg/ha N-P₂O₅-K₂O for irrigated hybrids, scaled down for composites and rainfed crops. Maize responds strongly to nitrogen, so splitting it is key to efficiency.
When should maize nitrogen be applied?+
Apply one-third of the nitrogen plus all P and K at sowing, one-third at knee-high (V6, ~30 days), and one-third at tasseling. The tasseling dose feeds grain fill and protects yield.
Is this tool free and private?+
Yes — completely free with no sign-up, and every calculation runs in your browser, so it works offline and your data never leaves the device.
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