The crop should be sown with the first pre-monsoon shower (mid June). Delayed sowing results in poor plant stand. A seed rate of 75 kg/ha may be used to ensure good stand. Under rainfed conditions, the seed rate should be increased to 100 kg/ha. The crop may be sown in rows 45 cm apart. The plant should be spaced at 10-15 cm. Seedling is always preferred under optimum moisture conditions and the seed should not be placed deeper than 3-4 cm in the soil.
The following practices should be adopted for growing soybean for seed purpose.
Selection of seed
The seed should be true to type, healthy and free from diseases. It should be procured from some certified agency.
The land should be prepared as in the case of pure soybean crop but the sowing should not be done earlier than the first week of July. Slightly higher seed rate i.e. 100 kg/ha should be used and the seed should be sown 30 cm apart in lines by kera method.
The off-type plants should be removed at the flowering time to maintain the purity of seed.
The other agronomic practices should be followed as being done in case of pure soybean crop.