Seed treatment: accelerating germination by stages and sowing by stages. Soak the seeds in warm water (40℃ to 50℃) for 24 hours for the first time. Spread the expanded seeds on a wet mat (covered with a wet sack) with a sieve, or put them in a gauze bag and put them in a warm place to accelerate germination. During the germination period, it should be washed with warm water once a day, and the seeds can be planted when 20% germinate. Use hot water (80℃) for the remaining hard seeds in Tang Zhong. First, put the seeds into the jar, then pour in hot water, stir with a wooden stick, pour in cold water for no more than 5 minutes, so that the water temperature quickly drops to 30℃ to 40℃, let it soak for 24 hours, screen out or float out the swollen seeds, and accelerate germination. The remaining hard seeds are Tang Zhong by the above method until all the seeds swell.

Sowing method: Sow in strips in irrigated land, with clear width of border surface 1m and border length 10m. At the same time of soaking seeds, water is poured into the border, and when the soil is loose, furrow sowing is carried out. Use 3 kilograms of seeds per mu, sow 4 rows per border, the bottom of the ditch should be flat, and the soil should be evenly covered, covering about 2 cm. Seedling raising in dry land can be carried out by field drilling with a row spacing of 25 cm.