Yam is a perennial herb of the Dioscoreaceae family. Its rhizomes are stick-shaped, fleshy hypertrophy, up to 1 meter long, white with stickiness. Stems 2-3 meters long, purple. Ye Zisheng spherical yam eggs. Yellow green flower. Triangular pods. Seed flat round. Medicinal parts of the tuber medicine. With spleen and stomach, Bufei Yishen effect. Can be used for spleen and stomach qi deficiency, labor injury cough, kidney absent spermatozoa embolism. Yam is not strict with the climate, warm and cold. Suitable for deep fertile and well-drained sandy loam. Cultivation points: 1. Site preparation and soil preparation: Choose fertile, well-drained sandy loam. Apply enough basal fertilizer, deepen over 35 centimeters deep, make fine leveling, and make it flat or high ridge. 2. Breeding methods: Reed head breeding. When digging for yam at the end of autumn and early winter, the better reeds should be soaked under the armpit for 4-5 days. Indoor wintering using sand trapping method requires about 5°C room temperature. In late spring, the plants can be planted with no frost at night. The spacing is 35-50 cm, the spacing is 15-20 cm, the ditch is 17 cm deep, and the ditch is 20 cm wide. The head of the reeds is laid flat, put the composted soil and then cover the soil, and water after a little suppression. The bulbous shoots were transplanted and transplanted. In late October, Taiyuan’s disease-free wound buds were harvested and placed in the sand in the house for the winter. In late spring, squats or ridges are made in April. The row spacing is 24 cm. The distance between the rows is 10 cm. The depth of the hole is 10 cm. Each hole has 3 grains. It can be transplanted in the fall. 3, field management: (1) timely weeding. (2) When the height of the seedlings is 35 cm. (3) Apply by the root, pay attention to the rainy season drainage. 4, pest control: anthrax, onset period of 50% tetrobacter 1000 times spray, 7 days once, 2 or 3 times in succession; before sowing with 1:1: 150 Bordeaux liquid soaking for 10 minutes. 5, harvest processing: in late October harvested bulbs leave seed. Go to the brackets and leaves before rooting. Be careful not to dig. The top of the reed head was left as a planting plant; the lower part was roughened with a bamboo knife and placed in a pot with yellowish smoke for 12-24 hours. After the yam was softened, the yam was taken out and sliced ​​and dried to a finished product.