The sweet potato in the middle and late stages can effectively increase the yield of sweet potato. There are three simple and easy ways to increase production.
1. Punch and top dressing: use a wooden stick, 20--30 cm away from the main root of sweet potato, hit a hole of about 30 cm deep, apply a proper amount of ternary compound fertilizer, and seal it with wet soil. If you use a hole on each side of the ridge to topdress, the effect is better.
2. Crack topdressing: When cracks appear on the ground during sweet potato expansion period, use 500 kg of potassium dihydrogen phosphate per acre to add 400 kg of water, or use 2.5 kg of urea and 10 kg of superphosphate, add 500 kg of water, and mix with fertilizer to grout. Plant irrigation 0.7--1 kg. After 15 days, the supernatant (soaked for 8-10 hours) soaked with grass ash per acre was filled and cracked. After the irrigation, the crack was sealed with soil.
3. Foliar spray fertilizer: Foliar spray 0.3% potassium dihydrogen phosphate solution, or grass ash soaked supernatant, no less than 70 kg per mu of fertilizer, spray once every 7 days, even spray 3 times.
Huaxian County Shang Hongyan
1. Punch and top dressing: use a wooden stick, 20--30 cm away from the main root of sweet potato, hit a hole of about 30 cm deep, apply a proper amount of ternary compound fertilizer, and seal it with wet soil. If you use a hole on each side of the ridge to topdress, the effect is better.
2. Crack topdressing: When cracks appear on the ground during sweet potato expansion period, use 500 kg of potassium dihydrogen phosphate per acre to add 400 kg of water, or use 2.5 kg of urea and 10 kg of superphosphate, add 500 kg of water, and mix with fertilizer to grout. Plant irrigation 0.7--1 kg. After 15 days, the supernatant (soaked for 8-10 hours) soaked with grass ash per acre was filled and cracked. After the irrigation, the crack was sealed with soil.
3. Foliar spray fertilizer: Foliar spray 0.3% potassium dihydrogen phosphate solution, or grass ash soaked supernatant, no less than 70 kg per mu of fertilizer, spray once every 7 days, even spray 3 times.
Huaxian County Shang Hongyan
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