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What fertilizers are mainly used for summer topdressing? A full analysis of type selection
What fertilizers are mainly used for summer topdressing? Please explain that in summer, field crops are mainly topdressed with nitrogen fertilizer, while cash crops such as vegetables, tobacco, grapes, and cotton need potassium fertilizer in addition to nitrogen fertilizer. For example, for spring corn, use a one-time application of urea as the base fertilizer as a reference. Apply the other half of the urea as topdressing at the end of July and...