Urea is a fast-acting nitrogen fertilizer that is widely used in production. However, some peasant friends have little knowledge of the properties of urea, and often blindly apply fertilizer to cause unnecessary losses. So what should be paid attention to when applying urea in production? Test Tube,Disposable Test Tube,Plastic Collection Tube,Virus Sampling Tube Jiangsu HXRT MD Co.,Ltd , https://www.jshxrtmed.com
1. Immediately after applying urea, water can not be poured. Because urea is an amine nitrogen fertilizer, it must be converted into amine nitrogen before it can be absorbed and utilized by crops. Due to different conditions such as soil quality, moisture, and temperature, the conversion process takes two to ten days to complete, and if it is applied immediately after application, the urea will be dissolved in water and lost.
2. Should not be spread on the surface. Urea is applied to the surface of the earth and needs to be converted to be absorbed by the crop. Most of the nitrogen in the transformation is volatilized, and the utilization rate is only about 30%.
3. Can not be used as a fertilizer. Because urea contains a small amount of biuret, it is harmful to the germination and growth of the seed. If it is necessary to make fertilizer, seeds and urea can be separated from the ground, and urea can not be used for seed soaking or seed dressing.
4. Do not mix with ammonium bicarbonate. After urea is applied to the soil, it must be converted into amine nitrogen to be absorbed by the crop. If ammonium bicarbonate is mixed, the rate of conversion of urea to ammonia will be greatly slowed down, and urea will be lost and volatilized easily.