Groundnut Fertilizer Calculator
Work out the exact urea, DAP and MOP for groundnut from the recommended 25:50:75 kg/ha N-P₂O₅-K₂O dose, adjusted to your soil test and field size.
All NPK basal at sowing — groundnut fixes its own N after nodulation. Apply gypsum at pegging (40–45 days) in the pegging zone; calcium there fills the pods.
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 Groundnut Fertilizer Calculator to convert the official groundnut 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 Groundnut Fertilizer Calculator
Groundnut needs little nitrogen (it fixes its own) but is famously hungry for calcium at pegging — 400 kg/ha gypsum applied at 40–45 days is often the single most profitable input on the crop. This calculator starts from the published recommendation of 25:50:75 kg/ha N-P₂O₅-K₂O (irrigated) or 20:40:40 kg/ha N-P₂O₅-K₂O (rainfed kharif), 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 Groundnut Fertilizer Calculator
- 1Enter your field area and pick the unit (hectare, acre or bigha).
- 2Choose the growing condition (irrigated / rainfed kharif) 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 Groundnut Fertilizer Calculator?
- ✓Official package-of-practices dose for groundnut — 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 groundnut?+
Irrigated: 25 kg N, 50 kg P₂O₅ and 75 kg K₂O per hectare; Rainfed kharif: 20 kg N, 40 kg P₂O₅ and 40 kg K₂O per hectare. All NPK basal at sowing — groundnut fixes its own N after nodulation.
Why apply gypsum to groundnut at pegging?+
Developing pods absorb calcium directly from the soil around them, not through the roots. Gypsum at pegging (≈400 kg/ha) supplies that calcium plus sulphur, cutting empty pods ('pops') sharply.
Does groundnut need urea top-dressing?+
Normally no. A small 20–25 kg/ha starter N is enough until rhizobium nodules take over fixation; extra urea delays nodulation and feeds foliage at the cost of pods.
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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