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1. Leave 3 leaves to take 6 to 7 knots of yam, leaving only the top 3 unfolding leaves when planting. The rest of the leaves are buried in the soil together with the leaves. 2. The buried Fasha land absorbs heat quickly and has a high temperature. When planting the yam, the tip and leaves of the soil exposed on the ground are covered with soil. The thickness of the buried soil is more than 3 cm. After the 2-3 days of the yam, the soil is covered and exposed. blade. 3. Before the planting, the mud and mud shall be used to stir the mud, and the base of the yam shall be smashed and then wetted and planted. 4. Cut the potato seedlings 7-10 days before planting and tie them into small ones. Dip the roots of the seedlings in clean water and thin mud. Root the roots to a length of 5 cm. Daejeon. 5, rooting method to take 0.1 grams of ABT rooting powder, mixed with water after warming and mixing 8 kilograms, soaking Miao base 2-3 quarters after planting 30 minutes. 6, take the fungus method to take 1000 grams of microbial agents, mixed with water and 10 kilograms, stirring, soaking the roots of 2-3 quarters after the planting of 2-3. 7. Before the deep-season cultivation method, the sweet potato shall be smashed open with dry earth on the top surface of the sweet potato, deeply squat about 10 per cent, loosen the wet soil in the nest, and then planted. After planting, the cultivator will promptly cultivate and promptly take root. Excerpted from China Agricultural Press>