Black gram Fertilizer Calculator
Work out the exact urea, DAP and MOP for black gram (urad) from the recommended 15:30:15 kg/ha N-P₂O₅-K₂O dose, adjusted to your soil test and field size.
Full dose basal. In rice-fallow urad (coastal rabi), drill or band the fertilizer rather than broadcasting — the unpuddled surface strands broadcast P where relay-sown roots can't reach.
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 Black gram Fertilizer Calculator to convert the official black gram (urad) 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 Black gram Fertilizer Calculator
Urad's two main niches — rainfed kharif and relay-sown rice fallows — get different doses because rice fallows start P-depleted and the relay crop can't be top-dressed at all. This calculator starts from the published recommendation of 15:30:15 kg/ha N-P₂O₅-K₂O (kharif (rainfed)) or 20:40:20 kg/ha N-P₂O₅-K₂O (rabi rice-fallow), 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 Black gram Fertilizer Calculator
- 1Enter your field area and pick the unit (hectare, acre or bigha).
- 2Choose the growing condition (kharif (rainfed) / rabi rice-fallow) 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 Black gram Fertilizer Calculator?
- ✓Official package-of-practices dose for black gram (urad) — 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 black gram (urad)?+
Kharif (rainfed): 15 kg N, 30 kg P₂O₅ and 15 kg K₂O per hectare; Rabi rice-fallow: 20 kg N, 40 kg P₂O₅ and 20 kg K₂O per hectare. Full dose basal.
How do I fertilize relay-sown urad in rice fallows?+
Where the seed is broadcast into standing rice, apply 20:40:20 as close to rice harvest as possible, ideally banded; foliar 2% DAP at flowering is the practical correction if basal wasn't feasible.
Does urad respond to potash?+
On red and coastal soils, yes — a modest 15–20 kg K2O improves pod fill and disease tolerance, though phosphorus remains the first-limiting nutrient.
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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