What are the most important issues to pay attention to when applying urea?
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Second, it cannot be mixed with ammonium bicarbonate. The mixed application of ammonium bicarbonate and urea will greatly reduce the rate of conversion of urea into ammonia, which is likely to cause loss of urea and loss of volatilization.
Third, it cannot be applied on the surface. Urea is applied to the surface and can be absorbed by the crop after 4-5 days of transformation at room temperature. Most of the nitrogen is volatilized during the ammoniumification process, and the utilization rate is only about 30%.
Fourth, water should not be poured immediately after urea application. Urea is an amide nitrogen fertilizer that must be converted to ammonia nitrogen after application to be absorbed and utilized by crops. If the urea is applied immediately after application or if the dry land is applied before heavy rain, the urea will be lost immediately.