When urea is used as topdressing in summer, it is also necessary to pay attention to timely soiling or irrigation. Due to the high temperature, urea conversion is fast, and the product after urea conversion is ammonium carbonate, which is less than the nature of ammonium bicarbonate, commonly known as “gas-fetal fertilizerâ€. Stable, it will produce large amounts of ammonia. If you do not bury urea in the soil or sprinkle it on the ground without immediate watering, then the consequences of volatilization of ammonia will cause the leaves to burn. In severe cases, the leaves of the plant will be boiled, even if the ammonia is not roasted. The loss of nitrogen caused by the leaves will also pollute the environment and reduce the utilization rate.
The application of urea as top dressing: First, it must be applied in advance, and second, it must be covered with soil.
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