First, choose the high-quality and deep-processing shaped sweet potato varieties Yushu No. 8, No. 7, Xuzhou No. 18, No. 1, Meiying No. 1, Yushu No. 13 and No. 12. Edible varieties can be used 139, Beijing 533, Zheng 20, Sushu 8, No. 3 and so on. Second, sweet potato fertilizer should be based on basal, should be re-applied organic fertilizer, less fertilizer, potassium fertilizer and phosphate fertilizer. 1, 2000 kg of fresh land per mu of fresh potatoes should be applied 2000 kg of farmyard manure, nitrogen, phosphorus, potassium compound fertilizer, 40% content of 15-20 kg, or 15 kg of phosphorus, potash, urea 5-6 kg. 2. 2000-3000 kg per mu mu should be applied to farmland fertilizer 2000-2700 kg, nitrogen, phosphorus, potassium compound fertilizer, 40% of the content of 25-30 kg, or 20 kg of potassium nitrate fertilizer, 15 kg of phosphate fertilizer. 3, 3000 kg per mu fertilization acres should be applied methane gas fertilizer or high-quality soil fertilizer 3000 kg, nitrogen, phosphorus, potassium compound fertilizer 40 kg or 30 kg of nitrophosphate, potassium sulfate 10 kg. 4, edible sweet potato varieties should be more organic fertilizer and phosphorus, potassium fertilizer to improve taste. Processing type sweet potato varieties should be appropriately reduced by using compound fertilizer, and the application of urea and ammonium bicarbonate can be increased per acre. 5, sweet potato expansion period can be used per mu 100-150 kilograms of biogas slurry and potassium dihydrogen phosphate 1-2 kilograms root watering. 6, late sweet potato appears to lack of fertilizer, can be sprayed on the sweet potato leaves, can be used per acre of 1% urea and 0.4% potassium dihydrogen phosphate mixture sprayed, spray fertilizer times 1-2 times as well. Other Drink Production Equipment We are manufacturer of Drink Production Equipment in China, we can supply seawater to fresh water equipment, bottled Water Production Line, canned water production line, juice, vegetable juice, yogurt pasteurization equipment, yogurt production line, etc. Water Bottle Machine,Plastic Water Bottle Machine,Pet Plastic Bottle Make,Plastic Bottle Blowing Molding Machine Guangzhou MeCan Medical Limited , https://www.medical-waste-incinerator.com