In the production of green agricultural products, in addition to the selection of excellent varieties, the use of biological pesticides without chemical pesticides, there are many emphasis on planting soil conditions and fertilization methods. Production of green agricultural products requires no pollution of the soil. As a farm producing green agricultural products, it is necessary to stay away from factories with sewage, waste gas and waste residue. Select the production base to collect soil samples in advance, send them to the relevant units for testing, check the residual amount of pesticides in the soil and the content of heavy metals. If it exceeds the standard, it is not suitable for the production base of green agricultural products. To produce green agricultural products, a large amount of organic fertilizer must be added. The production of green by product is mainly obtained by adding organic fertilizer, so it is necessary to build up organic fertilizer. The first is the accumulation of livestock and poultry manure. More livestock and poultry can increase the income of farming and build high quality organic fertilizer. The second is the use of weeds, straw, river pond mud, animal manure, large anti-high temperature compost and grass pond manure. The third is the return of straw to the field. It is required to have about 200 kg of straw returned to the field every season . For the production of green agricultural products, less or no fertilizer should be applied. Excessive application of nitrogen, phosphorus, and potassium fertilizers can contaminate the soil and then contaminate agricultural products. It is necessary to improve the structure of nitrogen, phosphorus and potassium fertilizers, and adopt measures of reducing nitrogen, stabilizing phosphorus and increasing potassium, which is beneficial to the balanced absorption of nutrients by crops. To produce green agricultural products, it is necessary to appropriately increase the application of trace element fertilizers. The application of micro-fertilizer can greatly increase the yield of crops, and at the same time effectively improve the quality of agricultural products and increase the content of trace elements in agricultural products. However, it should be noted that micro-fertilizers should not be applied more, and excessive amounts can contaminate the soil and pollute crops. Produce green agricultural products and irrigate non-polluting water. Water has a great impact on the quality of agricultural products. Inadvertent irrigation will contaminate agricultural products and will also contaminate fish and crabs in farmland.
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