How do vegetables rotate reasonably?

With many vegetable varieties, short growth cycle, and high multiple cropping index, scientifically arranging vegetable garden gargles can restore and enhance soil fertility, reduce pests and diseases, increase yield, and improve quality. It is an extremely important and extremely effective agricultural production increase measure. Then, in a reasonable rotation of vegetables, what characteristics should the growers know and what issues should be noted? We know that different types of vegetables require different fertilizers. For example, leafy vegetables such as greens and spinach require more nitrogen; fruits and vegetables such as tomatoes and peppers require more phosphate; potatoes and yams have roots and stems. Vegetables require more potash, and they can be used in continuous cultivation to make full use of various nutrients in the soil. Secondly, different vegetables have different root depths. Deep-rooted eggplant and legume vegetables are rotated with shallow-rooted cabbage and onion and garlic vegetables. Different levels of fertilizer in the soil can be used. In addition, the rotation of different types of vegetables can change the living conditions of pests and insects and reduce pests and diseases. For example, crop rotations and crop rotations can control soil-borne diseases; planting cabbage and vegetables after planting Chinese cabbage can greatly reduce the incidence of soft rot. In addition, it should be noted that the requirements for the alkalinity of various vegetables are different, such as cabbage, potatoes, etc., can reduce the acidity of the soil, so onions that are sensitive to soil acidity can be achieved as the round of pumpkin works. The purpose of the production can be increased, but the planting will reduce the production after the cabbage. According to the above principles, the rotation period of various vegetables varies. For example, cabbages, celery, cauliflower, onions, garlic, etc. can be used as a few crops in lands where there is no serious disease, and base fertilizers need to be added. In addition, from the standpoint of time, the interval between watermelon cultivation is 1-2 years. Potatoes, yams, ginger, cucumbers, peppers, etc. are 2-3 years old. Tomato, taro, eggplant, cantaloupe and peas are 3-4 years.