Pay attention to the dosage: all kinds of chemical fertilizers should master the optimal dosage. If the application is too late, it will easily lead to late maturity or fat damage. If the dosage is too small, the effect and ideal yield will not be achieved. In general, the amount of urea is preferably 10-15 kg per mu, 15-20 kg of ammonium nitrate, 20 kg of phosphorus nitrate, and 20-25 kg of ammonium bicarbonate.
Pay attention to the fertilization method: ammonium bicarbonate is highly volatile, and should not be applied to the surface and applied with water. The depth of the hole is 7~10 cm, and the cover is tight after application. Urea, ammonium nitrate, and phosphorus nitrate can be applied to the trench or used.
Pay attention to the watering time: the ammonium bicarbonate and the nitrophosphate fertilizer can be watered immediately after application. Urea is easily lost with water in the soil. It should not be watered immediately after application. It should be watered at intervals of 5-7 days.
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