Mustard Fertilizer Calculator
Work out the exact urea, DAP and MOP for mustard from the recommended 80:40:40 kg/ha N-P₂O₅-K₂O dose, adjusted to your soil test and field size.
Half N + full P, K + sulphur basal; remaining N at first irrigation (~30–35 days). Sulphur is the oil-builder — use gypsum or single super phosphate, not just DAP.
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 Mustard Fertilizer Calculator to convert the official mustard 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 Mustard Fertilizer Calculator
Mustard is an oilseed, and sulphur is what fills the oil: 40 kg S/ha typically lifts both yield and oil content, which is why SSP or gypsum beats a DAP-only program. This calculator starts from the published recommendation of 80:40:40 kg/ha N-P₂O₅-K₂O (irrigated) or 40:20:20 kg/ha N-P₂O₅-K₂O (rainfed), 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 Mustard Fertilizer Calculator
- 1Enter your field area and pick the unit (hectare, acre or bigha).
- 2Choose the growing condition (irrigated / rainfed) 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 Mustard Fertilizer Calculator?
- ✓Official package-of-practices dose for mustard — 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 mustard?+
Irrigated: 80 kg N, 40 kg P₂O₅ and 40 kg K₂O per hectare; Rainfed: 40 kg N, 20 kg P₂O₅ and 20 kg K₂O per hectare. Half N + full P, K + sulphur basal; remaining N at first irrigation (~30–35 days).
Why use SSP instead of DAP for mustard?+
SSP carries 12% sulphur along with phosphate; sulphur drives oil synthesis in mustard, typically adding 10–15% yield. With DAP you must add gypsum separately to supply the ~40 kg S/ha the crop needs.
What is the rainfed mustard fertilizer dose?+
About 40:20:20 kg/ha N-P2O5-K2O — half the irrigated dose — all drilled at sowing because there may be no later moisture to dissolve a top-dressing.
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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