1. Site selection A garden plot with a flat terrain, sufficient sunlight, good water source, and convenient transportation should be selected for the construction of the garden. For low-lying land to be digging drainage ditch, improve irrigation and drainage conditions of the land.
2. According to the soil of the vegetable garden, the soil is increased and the soil is increased. For soils that are too viscous, appropriate sand, landfill, and river sands are used for improvement; for clay soils with poor fertilizer retention and poor water retention, clays should be used for improvement. After the garden is selected, farmyard manure with plenty of organic matter should be applied to improve the fertility of the plot. Generally 5000 to 10,000 kilograms are applied per acre per year. The method of fertilization is to spread it evenly, then plow it so that it is thoroughly mixed with the soil. In the early years of the establishment of the park, the best interplanting of green manure can speed up the plots of fertilization. The vegetable garden not only requires high fertility, but also requires deep soil. Generally, the soil layer is shallow and not more than 15 cm. Moreover, there is a very hard plow bottom, which does not meet the requirements of vegetable growth on the soil. After the vegetable garden is changed, deeper plowing methods should be used to gradually deepen the plow layer and mature it. The soil soft layer can reach 30-50 cm.
3. Chemical Fertilizers The demand for chemical fertilizers for vegetables is much higher than that in Daejeon, and there are many types of fertilizers required. In addition to meeting nitrogen, phosphorus, and potassium, demand for trace elements such as calcium and magnesium is also large. When applying chemical fertilizers, single application and multiple nitrogen fertilizers should be avoided. In the land where calcium and magnesium are deficient, calcium fertilizer and magnesium fertilizer must be applied, or chemical fertilizers containing calcium and magnesium such as calcium magnesium phosphate fertilizer, superphosphate, potassium magnesium sulfate, and boron magnesium fertilizer.
4. Rinse mouth arrangement At the beginning of the construction period, it is better to grow some vegetables with less water and fertilizer requirements, such as peas, onions, and Chinese cabbage. After a few years of planting, the degree of soil maturation increased, water, fertilizer, gas, and heat conditions were fully improved, and tomato, cucumber, Chinese cabbage, and other vegetable varieties requiring higher soil fertility were planted.
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