Pigeonpea Fertilizer Calculator
Work out the exact urea, DAP and MOP for pigeonpea (arhar) from the recommended 25:50:25 kg/ha N-P₂O₅-K₂O dose, adjusted to your soil test and field size.
Full dose basal in the seed furrow. Long-duration arhar sits in the field 160–270 days but still needs no top-dressing — nodules supply N after the starter.
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 Pigeonpea Fertilizer Calculator to convert the official pigeonpea (arhar) 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 Pigeonpea Fertilizer Calculator
Pigeonpea's deep taproot mines subsoil moisture and nutrients for up to nine months from one basal dose — the P-heavy starter plus rhizobium does the rest. This calculator starts from the published recommendation of 25:50:25 kg/ha N-P₂O₅-K₂O (kharif (sole crop)), 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 Pigeonpea Fertilizer Calculator
- 1Enter your field area and pick the unit (hectare, acre or bigha).
- 2Choose the growing condition 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 Pigeonpea Fertilizer Calculator?
- ✓Official package-of-practices dose for pigeonpea (arhar) — 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 pigeonpea (arhar)?+
Kharif (sole crop): 25 kg N, 50 kg P₂O₅ and 25 kg K₂O per hectare. Full dose basal in the seed furrow.
Why does long-duration arhar not need top-dressing?+
Its deep taproot keeps accessing subsoil nutrients and its nodules keep fixing N through the season, so packages keep the whole 25:50:25 dose basal at sowing.
What fertilizer for arhar intercropped with soybean or maize?+
Fertilize the intercrop system for the dominant cereal/oilseed and give arhar rows their P-led basal; both ICAR packages and farm trials show arhar mainly responds to phosphorus.
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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