If the same crop is cultivated several times in the same land, the soil's nutritional structure will be destroyed and the soil quality will be degraded. The performance is that the soil is not soft and easy to form into lump, and the crops grow slowly and are easy to get sick. This is a great hazard to the soil. In order to avoid this situation, a rotation system and soil testing and fertilizer application should be adopted.
Rotation is to change crop types in turn, such as planting sweet corn once, changing vegetables or rice, and then planting sweet corn the next year. Different crops absorb different fertilizers. Rotation can prevent the destruction of soil nutrients. Soil testing and formula fertilization are more refined. It is through the selection of soil samples, through the instrument for soil analysis, and then according to the characteristics of the soil and crops on the nutritional requirements, a reasonable mix of fertilizer species and dosage.
This will not only prevent the waste of fertilizer, but also prevent the destruction of the soil and the pollution of excess fertilizer. The current rotation system and soil testing and fertilization techniques have been promoted in many villages and have achieved good results.
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