One is to raise the seedlings. After planting 7-10 days of cultivating, 20-30 kilograms of human and animal manure water should be used for 10-15 kilograms of ammonium bicarbonate or 5 kilograms of urea (preferably 4-10 kilograms of high-efficiency compound fertilizer 7-10 kilograms). The same time, acres of plant ash 100-150 kilograms of mixed superphosphate 25-30 kilograms shall be applied between the ponds and not in the pond (the base fertilizer shall be raised only with human and animal manure water with high-efficiency compound fertilizer); when vine leaves are ridged, 21.8% of sulphuric acid shall be used per mu. Zinc 0.5 kg or compound zinc fertilizer 0.8 kg water 50 kg foliar spray; in early October, acres of potassium dihydrogen phosphate 100 grams, urea 150 grams, 50 kilograms of water spray 2-3 times.
The second is the cutting-edge cultivation. When the sweet potato seedlings survived, all the seedlings were removed, which shortened the vines, increased branching, increased green leaves, and improved the plant type, so as to facilitate multi-tuber crops. Note: Do not turn the rattan, let alone "hit the rattan rattan". Take advantage of the fact that you can take care of Fujimoto, cut off the fibrous roots, and control leggy.
The third is to prevent flooding. It is necessary to clean the silt at any time to repair ridges and ensure that there is no stagnant water in the furrows.
The fourth is timely harvest. In the middle of November, sweet potatoes are harvested for the purpose of planting, eating, or feeding, vines are used as vegetables, and vine leaf silage is used as feed. Note: Harvesting too early and late will reduce yield, quality and storability. Fresh potatoes may be dug in advance as early as possible.
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