Transplanted paddy on 3 bigha at Tk 80/kg:
Base seed 10.03 kg → 11.15 kg at 90% germination, costing Tk 892; nursery needed: 4.96 decimals.
What to know in Bangladesh
Low germination means more seed: if old or damp seed only sprouts at 70%, use 1.43× seed.
Broadcasting vs rows: broadcast wheat and mustard waste more — keep to the lower end of the range (wheat 120, mustard 8) when sowing in rows.
Late sowing: if the rabi sowing runs late, advisers suggest raising the rate by 10–15%.
Onion true seed vs seedlings/sets: this tool covers true seed (4–5 kg/ha); seedlings or sets need completely different rates — ask an agriculture officer.
Rates for all 9 crops (kg/bigha and kg/acre)
Crop
kg/ha
kg/bigha
kg/acre
Paddy (transplanted)
25
3.34
10.12
Wheat
120
16.06
48.56
Mustard
9
1.20
3.64
Potato
1,750
234.15
708.23
Maize
21
2.81
8.50
Lentil
37.5
5.02
15.18
Onion (true seed) *
4.5
0.60
1.82
Garlic (cloves)
850
113.73
344.00
Sunflower *
10
1.34
4.05
* Being verified — the tool shows a provisional badge.
More: when rates move up or down
Bold-seeded wheat (Gom-24/28) takes 140 kg/ha — 18.73 kg/bigha. Lentil farmers often use up to 52 kg/ha, but the recommendation is 35–40. Maize for grain takes 20–22 kg/ha, sweet corn 10–12. Garlic needs 700–1,000 kg of cloves/ha depending on clove size.
Total seed cost is the rate above times your local price — seed prices vary a lot by season and variety, so enter the price yourself in the tool.
Frequently asked questions
How much paddy seed per bigha?
Transplanted paddy is recommended at 25 kg/ha, i.e. 3.34 kg/bigha. At 90% germination that is 3.72 kg — 11.15 kg for 3 bigha. The nursery needs 5 decimals per acre.
How much wheat seed per bigha?
Normal varieties (Gom-25/26/27) take 120 kg/ha = 16.06 kg/bigha; 17.84 kg at 90% germination. Bold-seeded Gom-24/28 at 140 kg/ha needs 18.73 kg (20.81 kg at 90%).
How much mustard seed per bigha?
9 kg/ha = 1.20 kg/bigha, or 36.5 g per decimal (40.5 g at 90% germination). Allow a little extra when broadcasting.
Germination is only 70% — how much extra seed?
Multiply by 100 ÷ 70 = 1.43. Wheat for 1 bigha rises from 16.06 kg to 22.94 kg.
How much potato seed per bigha — whole or cut?
The recommendation is 1.5–2 t/ha; this tool uses 1.75 t = 234.15 kg/bigha. The official whole-vs-cut table is still unverified — compare per-kg prices and use whichever is cheaper.
What is the onion seed rate?
True seed runs 4–5 kg/ha, about 602 g per bigha. This rate is still provisional — the tool shows a verifying badge.
How much nursery for how much planted land?
Paddy needs 5 decimals of nursery per acre. Planting 3 bigha (≈0.99 acre) needs 4.96 decimals of nursery.
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