Spacing & seed quality

Area to sow

Row spacing (cm)

Plant-to-plant spacing (cm)

Seeds per hill

Germination (%)

Physical purity (%)

Test weight (1000-seed weight) (g)

Printed on the seed packet or measured by weighing 1000 seeds.

Results

Seed required12.15 kg

Seed rate12.15 kg / acre

Plant population per acre33,724

Plant population per hectare83,333

Total hills / plants in area33,724

Seeds to sow40,485

How it's calculated

Plants per acre = 4,046.86 m² ÷ (row spacing m × plant spacing m)
Seeds to sow = plants × seeds per hill ÷ (germination × purity)
Seed (kg) = seeds × test weight (g) ÷ 1,000 ÷ 1,000

Assumptions

Uniform square/rectangular spacing with no gaps for bunds or paths. Field emergence is often lower than lab germination — many growers add a small safety margin.

Worked example

1 acre at 60 × 20 cm → 33,724 plants; 1 seed/hill, 85% germination, 98% purity → 40,485 seeds; at 300 g/1000 seeds = 12.15 kg.

Results are indicative estimates. Always follow the crop-specific recommendation from your soil-test report, state agricultural university, or local Krishi Vigyan Kendra (KVK).