Hybrid napier Fertilizer Calculator
Work out the exact urea, DAP and MOP for hybrid napier from the recommended 100:50:40 kg/ha N-P₂O₅-K₂O dose, adjusted to your soil test and field size.
Establishment: half N + full P, K at planting, rest N at 30 days. From year 2: ~25–30 kg N/ha after every cut (6–8 cuts/yr) plus annual P, K maintenance. Nitrogen after each cut IS the yield.
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 use the free Hybrid napier Fertilizer Calculator to convert the official hybrid napier recommendation into exact urea, DAP and MOP quantities for their own field in seconds — no agronomy tables, no spreadsheet, and it works offline in the field.
About Hybrid napier Fertilizer Calculator
Hybrid napier (CO-4/CO-5 type) is a nitrogen-to-biomass converter: the after-every-cut urea ritual is what separates 100-tonne stands from 250-tonne stands on the same land. This calculator starts from the published recommendation of 100:50:40 kg/ha N-P₂O₅-K₂O (establishment year) or 200:50:40 kg/ha N-P₂O₅-K₂O (maintenance (per year, multi-cut)), adjusts it ±25% for your soil-test N, P and K ratings, scales it to your field area in hectares, acres or bigha, and converts the nutrients into real products — urea (46% N), DAP (18-46-0) and MOP (0-0-60) — including the number of bags to buy.
How to use Hybrid napier Fertilizer Calculator
- 1Enter your field area and pick the unit (hectare, acre or bigha).
- 2Choose the growing condition (establishment year / maintenance (per year, multi-cut)) and your soil-test ratings for N, P and K — leave Medium if you have no recent soil test.
- 3Read off the urea, DAP and MOP quantities and bag counts, then follow the split-application note for timing.
Why use Hybrid napier Fertilizer Calculator?
- ✓Official package-of-practices dose for hybrid napier — not a generic NPK guess
- ✓Soil-test Low/Medium/High ratings adjust the dose ±25% automatically
- ✓Converts nutrients to urea, DAP and MOP bags, with the DAP nitrogen credit handled correctly
- ✓Works in hectares, acres and bigha — and runs fully in your browser, even offline in the field
Frequently asked questions
What is the recommended fertilizer dose for hybrid napier?+
Establishment year: 100 kg N, 50 kg P₂O₅ and 40 kg K₂O per hectare; Maintenance (per year, multi-cut): 200 kg N, 50 kg P₂O₅ and 40 kg K₂O per hectare. Establishment: half N + full P, K at planting, rest N at 30 days.
How much urea after each napier cut?+
About 55–65 kg urea/ha (25–30 kg N) within a week of every cut, watered in. Skip it and the next cut's tonnage drops by a third or more.
How long does a napier stand stay productive?+
With after-cut N, annual P–K maintenance and a gap-filling round each year, 4–6 productive years is normal before replanting with fresh slips.
How does the calculator convert NPK into urea, DAP and MOP?+
DAP (46% P₂O₅) is sized to cover the phosphorus need; the nitrogen it also carries (18% N) is credited against the N requirement, and urea (46% N) supplies the balance. MOP (60% K₂O) covers potassium. Bag counts use 45 kg urea and 50 kg DAP/MOP bags.
Is this tool free, and does my data leave the device?+
It is completely free with no sign-up, and all calculation happens in your browser — nothing you enter is uploaded, so it also works offline in the field.
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