条件筛选
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Understand the nitrogen content before applying commercial organic fertilizer
To apply commercial organic fertilizer, you must know its nitrogen content
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What are the methods for increasing soil organic matter content?
How can the organic matter content of the land be increased? Please describe the methods. You can refer to the following methods to increase the organic matter content of the land: 1. Vigorously promote the return of straw to the field. Returning straw to the field is an important way to increase soil nutrients, raise soil organic matter content, improve soil physical and chemical properties and potassium and phosphorus nutrient conditions, and enhance soil microorganisms...