The more chemical fertilizer is applied, the more the yield increases.

With the application of chemical fertilizer, the grain output has been greatly increased. However, after years of application of chemical fertilizer, the input of organic fertilizer is reduced, resulting in soil consolidation, lack of trace elements and serious imbalance of nutrition. even if the amount of chemical fertilizer is increased, it is difficult to rejuvenate the soil.

Then, how to maintain the nutrient balance of the soil is the key.

First, the application of organic fertilizer, planting green manure and rational application of chemical fertilizer are beneficial not only to the high yield of crops, but also to the restoration and improvement of soil fertility.

Second, long-term repeated cultivation of the land will lead to the decline of soil fertility, and then affect the growth and development of crops. Properly increasing the planting area of leguminous crops, planting a crop of leguminous crops in about four years during rotation can increase the content of nitrogen in the soil. At the same time, after legume green manure crops are turned into the soil, a large number of roots, stems and leaves can increase soil organic matter. Improve soil physical and chemical properties, improve soil fertility.

Third, after the crop harvest, the straw is chopped and returned directly to the field, which can improve the physical properties of the soil, promote the formation of soil aggregate structure, increase the ability of air permeability, water permeability and fertilizer conservation, so as to improve soil fertility.