The role of cover soil after sowing of vegetables is mainly to maintain the temperature and humidity of the seed, form a good nursery environment, and facilitate emergence. In addition, if the vegetables are not covered with soil after sowing, the topsoil of the glutinous surface will easily lose water and dry, causing the seeds to dry out. Even if the seeds do not dry out, the seed buds will be easy to uncover under the seed husks. The seeds will not be under pressure and they will easily form “hats ", affecting the expansion of the cotyledons. Moreover, the seedlings are not deeply rooted. When a windy or heavy rain strikes, they are often rickety. The soil covered by vegetables after sowing is generally a fully cooked farmyard fertilizer and vegetable garden soil and an appropriate quantity of compound fertilizer (some of which are also added with pesticides and fungicides). The ratio of farmyard manure to vegetable garden soil is 4:6. 1 kilogram of compound fertilizer is added for every 1000 kilograms of nutrient soil. Insecticides and fungicides (control soil-borne diseases or underground pests during seedling stage) are added according to the instructions for use. Usually before sowing can be used to cover this kind of nutrient soil 1 to 3 cm thick, after sowing seeds evenly cover 0.5 to 1 cm thick, depending on the size of the seed, the general seed can be small and thin, larger seeds Something thicker, at least cover no seeds. Hospital Nursing Trolley,Nursing Cart,Convenient Nursing Trolley,Stainless Steel Nursing Trolley NANJING TIANAO MEDICAL INSTRUMENTS MANUFACTURE CO.,LTD. , https://www.tianaomedical.com