How to apply base fertilizer and topdressing for planting Chinese yam?

How to apply base fertilizer and topdressing for planting Chinese yam? Please give guidance on the methods of planting yam, applying base fertilizer and topdressing can refer to the following methods: first, base fertilizer. Select a good field, before ploughing, apply mature farm manure 2000 kg-4000 kg, compound fertilizer 60 kg-80 kg as base fertilizer, and then plough the soil 30 cm and rake it to pieces. Second, topdressing. Nitrogen fertilizer was the main fertilizer at seedling stage, and 10 kg-15 kg high nitrogen and potassium compound fertilizer was applied per mu. In early July, 20 kg-25 kg of high nitrogen and potassium compound fertilizer was applied per mu, and 0.25% potassium dihydrogen phosphate was sprayed once. Starting from late July, 0.25% potassium dihydrogen phosphate can be sprayed 2-3 times, and 20 kg-30 kg of nitrogen, phosphorus and potassium compound fertilizer per mu in the first ten days of August. Tuber filling period generally does not take soil topdressing, can be sprayed with 0.25% potassium dihydrogen phosphate once to prolong the vine growth time. Click to get more yam planting techniques click to get more vegetable planting techniques