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When fertilizing potatoes, the ratio of nitrogen, phosphorus and potassium should be appropriate
Potatoes have an equally important demand for nitrogen, phosphorus and potassium. In the process of yield formation, nitrogen supply is the foundation, ensuring the formation of sufficient green leaf area for photosynthesis; phosphorus supply is also indispensable for tuber formation and starch accumulation; on the basis of sufficient nitrogen and phosphorus, potassium supply is essential for carbohydrate assimilation in the early stage and for the later transport from above ground to underground tubers and starch accumulation. Field tests show that the absorption ratio of nitrogen, phosphorus and potassium by potatoes is about 1:0.5:2.5. In response to this demand
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Why should cotton topdressing be appropriately advanced?
For seedbeds using nutrient-pot seedling raising, apply decomposed human manure and decomposed organic fertilizer early, and apply compound fertilizer in appropriate amounts. Generally, for a 10 sq m seedbed, apply 0.5-0.7 kg of compound fertilizer with a nitrogen, phosphorus, and potassium content of 45%. Never use urea as the base fertilizer for the seedbed. For the base fertilizer in cotton fields, first increase the application of various organic fertilizers, or...
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