In the vegetable production, the vegetable farmer is willing to spread the urea on the ground surface or flush with the water for the sake of convenience when applying urea, so that the urea not only fails to exert the fertilizer effect well, but also causes great waste. After the urea is applied to the soil, it can be absorbed and utilized by the crop by converting it into ammonium nitrogen under the action of urease. As urea is an amide nitrogen fertilizer, the adsorption force between soil colloids is low and the fluidity and leaching loss are strong. If urea is flushed with water, urea is difficult to be adsorbed by soil colloids and converted into ammonium carbonate or ammonium bicarbonate to exert a fertilizer effect. More loss. When urea is applied to the soil and converted into ammonium nitrogen, it loses its original stability, it is easily volatilized, and the amount of volatilization increases with increasing alkalinity of the soil. According to tests conducted on soils with a pH of 7-8, The urea began to evaporate in half a day and peaked in three days. Therefore, it should be avoided that it should be applied in depth or in shallow form. Deep application can be applied by ditching or acupuncture, applying a depth of 10 to 15 centimeters, a distance of 5 to 10 centimeters from the plant, covering the soil after application, burying it tightly, and do not water it within 2 to 3 days after application. Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone Urine bag,pee bag,urine collection bag,urine leg bag 2 MEDS TECHONOLOGY CO.,LTD , https://www.2-meds.com