Due to the long-term vegetative growth and reproductive growth of soybean, the absorbed NPK element is significantly higher than wheat and corn. Therefore, high yield of soybeans needs to supply sufficient nutrients. In addition to nitrogen, more phosphorus and potassium nutrients need to be supplied.
The large amount of nitrogen, phosphorus and potassium absorbed by soybeans reaches the peak after the flowering and to the drumming stage. Therefore, the application method of soybeans is: before the flowering or at the beginning of flowering, 10-15 kg of urea per acre is applied, and the soil is applied by the ditching strip. Phosphorus and potassium fertilizer is suitable for foliar spraying. It can be used with 0.1%-0.3% potassium dihydrogen phosphate solution for about 50 kg per mu, which can be carried out 2-3 times, with an interval of 7-10 days.
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