• By plowing the field 2 to 3 times, make the soil fine-brown. • Add rotted cow dung at the rate of 6-8 tonnes per acre and then mix it well in the soil. • To prevent gall disease, mix Trichoderma (5-10 ml/L) in soil 2-3 days before nursery planting. • Take out 30-35 days old seedlings from nursery and transplant them by dipping them in Trichoderma (5-10 ml/L) solution for 15 minutes.