Organic fertilizer refers to all substances that contain organic matter and provide various nutrients for the growth and development of crops. Organic fertilizers have many advantages, such as fertilizing the soil, improving the nutrition of plants, and providing fertilizer for a long time. It is an important source of fertilizer in agricultural production. Because organic fertilizers have the irreplaceable advantages of chemical fertilizers, people have always paid great attention to the production and use of organic fertilizers in agricultural production. However, some people think that the more organic fertilizers the better, this view is not correct. Because organic fertilizers, like chemical fertilizers, there are also problems with metered application in agricultural production. If the amount of organic fertilizer is too much, it is not only a waste, but also can cause soil obstacles and affect the growth of crops. For example, in the production of Vegetables in protected areas, excessive application of organic fertilizers for a long period of time can also lead to excess nitrogen in the soil and cause Nitrate content in vegetable products is excessive and affects human health. Therefore, the application amount of organic fertilizers in production should be rationally used according to the consumption of various nutrients and organic matter in the soil, so that formula fertilization can be achieved.
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