Calculate seed requirement based on plant spacing, row spacing, 1000-grain weight and germination rate.
Calculate your exact seed requirement in seconds. Enter field area, plant spacing, row spacing, 1000-grain weight, and germination rate to get plants per hectare, total seeds needed, and seed weight in kilograms. No more guessing — plant the right population for maximum yield.
You planted 30 kg of corn seed last spring only to find 20% empty patches at emergence. The germination test said 85%, but you planted as if it were 100%. That mistake cost you 12 bushels per acre. This calculator accounts for germination rate automatically, so you always seed the right amount.
Accurate seed rate ensures optimal plant population for maximum yield. Too dense causes competition; too sparse wastes land.
A: If germination is 85%, you need 15% more seed to achieve the same plant population. The calculator divides theoretical plants by germination rate to give actual seeds needed. Always test seed before planting — bag labels can be optimistic.
A: Corn: 250-350g, wheat: 35-50g, rice: 25-30g, soybean: 150-200g, peanut: 500-900g. 1000-grain weight varies by variety and growing conditions — weigh a representative sample from your own seed lot for accuracy.
A: Yes. Add 5-10% extra to account for field losses, bird damage, and uneven germination. But do not exceed 15% — overplanting causes competition and reduces yield. The calculator already includes germination adjustment, so the margin is for field losses only.