What are the most important issues to pay attention to when applying urea?

First, try to avoid separate application. The ideal application method is to apply the organic fertilizer first, and then apply the urea, the superphosphate and the potassium chloride in a reasonable formula.

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 it can be absorbed by the crop after 4 to 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, it is not possible to irrigate water 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 water is applied immediately after application or before heavy rain, urea will be lost.

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PH-B-L2

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