In summer, the direct broadcast of vegetables can easily lead to poor growth, and it is also susceptible to pests and diseases. It is necessary to carry out seedling transplanting. Transplanting nursery to do the following work: 1. Choose a plot. After selecting the plots, adequately decomposed farmyard manure should be added as base fertilizer, and shallow ploughing should be carried out. The nursery site should be high and dry, soil permeability and water retention are good, and irrigation and drainage can be performed. Avoid continuous cropping or sorghum. Seedlings were planted on the same vegetable plot in order to avoid the harm caused by soil-borne diseases. 2. High temperature hazards. High temperatures are difficult for lettuce and celery to germinate. Seeds can be soaked for 8 hours and then wrapped in wet sand, primed in cold water or cold, or celery treated at 2-5 degrees Celsius for 48 hours, and lettuce at 5 degrees Celsius. 72 hours, can promote the germination rate, but also sprinkle some cut straw or straw in the seedbed, or shading net cover the seedbed. 3. Anti-virus disease hazards. Severe vegetable virus disease occurs at high temperatures. Treat the mustard and tomato seeds with 10% trisodium phosphate solution for 10 minutes. Rinse with clean water. Select antiviral diseases, and prevent aphids. 4. Anti-rainstorm hazards. In summer, heavy rain makes soil compacted, which is not conducive to seed germination and excavation. Gaozao should be used as a seedbed. Sandy loam soil should be selected in storm-prone areas. Drainage should be smooth around the seedbed. Temporary cover should be used to reduce heavy rain hazards. When the soil is excavated, it should be ploughed on the seed bed after the rain to prevent the knots of the soil panels. 5. Drought hazards. After planting enough water in the seedbed to sow, or fully irrigating and then soil preparation, planting, planting, soiling, covering with soil, cover the seedbed in the morning or evening, and then open the seedlings for seeding. China Extract Powder For Use As Dietary Supplement Extract Powder, Extract Powder Manufacturer Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.bodybuildingoil.com