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Why must potassium fertilizer be applied for watermelons to be sweet?
According to surveys, according to surveys, the problem of imbalanced nitrogen, phosphorus, and potassium content ratios in current watermelon field soil is relatively prominent. Watermelon is a crop that needs potassium. Increasing potassium fertilizer application can raise the sugar content of the fruit. When applying potassium fertilizer to watermelons, generally 12-18 kg of potassium sulfate can be applied per mu, that is, 2-3 kg per mu as base fertilizer, 6-8 kg as topdressing at the seedling stage, ...