How can cotton be given base fertilizer skillfully to increase yield?
For base fertilizer in cotton fields, first, apply more organic fertilizers of various kinds, or bio-organic compound fertilizers; second, achieve formula fertilization and balanced fertilization, applying nitrogen, phosphorus and potassium in a ratio of 3:1:3; third, for insect-resistant cotton, apply more potassium fertilizer, with no less than 15 kg per mu as base fertilizer, plus 0.5-0.7 kg of zinc fertilizer and 0.4 kg of Chilibor; fourth, apply fertilizer in an appropriate amount, and do not blindly pursue quantity; applying 25-30 kg per mu of high-content ternary compound fertilizer is sufficient; fifth, change broadcast application to furrow application or hole application, and the cotton seedling roots should maintain a certain distance from the fertilizer.