There is a good way to cultivate high yield of yam.

Chinese yam is also known as Dioscorea zingiberensis, wild yam and Huai mountain. Chinese yam is a perennial winding herb, underground cylindrical, endoplasmic hypertrophy, rich in starch, can be used to make starch, tropical areas are often used as food. Chinese yam has a unique flavor. It is a precious vegetable, a tonic and a good raw material for wine making. In this paper, the high-yield cultivation techniques of Chinese yam are introduced as follows: selected land and whole border yam is a kind of vegetable with underground fleshy tuber organs as its products, and its roots are fine, so the requirements for soil physical and chemical properties are relatively strict. Generally requires deep soil layer, good permeability, rich in organic matter, good drainage of sandy soil or sandy loam planting, border height requirements of more than 60 cm, border surface 80 cm. Drilling holes with sufficient base fertilizer is one of the key technical measures. After finishing the border, choose a specification of 1.5m in length and 2cm in diameter to shake the steel plate while making holes in the border cloth, and make a deep hole of deep rice and 10cm in diameter (so that the yam block has a loose growth environment and grow long and straight,) combined with rotten organic fertilizer, such as high-quality barnyard manure, human urine baking, chicken baking and soil fertilizer, 2000 kg per mu. Sow at the right time in the middle and late March, choose sunny or blocking days (not suitable for rainy days), cut the yam into 5 cm per section, put a section vertically in each hole, not inverted (pay attention to fertilizer isolation to prevent rotten seeds), and then cover 5-8 cm of soil.  field management yam is propagated by underground tubers. After germination, it goes through germination stage, seedling stage, sprouting stage and tuber expansion stage. Before the budding stage, it was dominated by stem and leaf growth, and after budding was the tuber expansion stage. In the early stage, the stem and leaves grew vigorously synchronously with the tuber, and in the later stage, the tuber grew mainly, when the dry matter accumulated by the tuber accounted for more than 85% of the total dry matter. In order to promote the growth of stems and leaves in the young stage, the amount of nitrogen fertilizer can account for 1 / 2 of the total growth period, and part of potassium fertilizer should be applied. Phosphorus and potassium fertilizer and the remaining nitrogen fertilizer should be applied in the rosette stage and tuber expansion stage to facilitate the growth of tubers. Shallow ditches were opened on both sides of the yam planting line. Timely harvest of yam has a long harvest period, which lasts from early September to Spring Festival next year. In order to obtain better economic benefits, yam can be harvested at the beginning of September.