When the amount of nitrogen applied to wheat exceeds a certain limit, it often fails to increase production but decreases production, even leading to deterioration of wheat quality. Therefore, under fertility conditions of more than 7,500 kg per hectare, 210-240 kg of pure nitrogen per hectare is required to achieve high quality, high yield and high efficiency. Regarding the proportion of nitrogen-based top-dressing and the top-dressing period, it is generally required that the bottom-dressing account for 1/2, and the top-dressing period should occupy l/2. Isolation Garments,Isolation Gown,Pp Isolation Garments,Isolation Coveralls Taizhou huangyan Yiman industry & trade limited , https://www.yimancoverall.com