What can be done to increase the yield of sweet potatoes?

What methods can make sweet potato yield increase? Please point out the kind of sweet potato to increase production can refer to the following methods: (1) to turn the vine for the hand vine. In the past, many farmers used to turn sweet potato vines, picking up sweet potato stems with sticks and beating them hard to avoid taking root. During the growth of sweet potato, the vine is generally turned 2-3 times, and the damage amount of stem vine is large, and the yield is reduced by less than 20%. The yield can be increased by more than 10% if it is changed to hand-held vine. The method is: when the field is watered or after rain, lift the stem and vine by hand and move it to another place, so that the original leaf layer will not be disturbed, and the sweet potato stem and vine will not take root again. (ii) Timely toppling. When sweet potato grows to 40- 50 cm long, pick out the top center. After the branches grow to 30-35 cm long, continue to pick the heart. This method can inhibit excessive growth of stems and vines, avoid excessive consumption of nutrients, and thus concentrate nutrients on root tuber. The time to remove the top of the heart to sunny noon is good, pay attention to early thin barren land do not pick the heart. (iii) Foliar fertilizer. In sweet potato round tree and root swelling period, respectively with 500 times of potassium dihydrogen phosphate aqueous solution and 200 times of rice vinegar solution foliar spray, mu spray 60-65 kg, can increase production of more than 400 kg. (iv) Plant ash irrigation of roots. When the sweet potato grows to the later stage, the sweet potato block has arched the ground to crack, the plant ash can be mixed with water according to the ratio of 1:30, and the filtrate is used for sweet potato irrigation. This method can not only increase production by 20%-30%, but also taste good potato pieces and good quality. Click for more sweet potato planting technology Click for more vegetable planting technology