In the past agricultural production, the phenomenon of blind seeding was very serious. In particular, the fertilization operation was entirely "following the feelings." Basically, it was through experience that whether or not fertilization was needed. What kind of fertilizer should be applied? Because of lack of scientific nature, empirical fertilization was practical. It is very unreliable and often leads to cost, but the final crop yield and quality are not satisfactory. However, the appearance of a soil tester enabled the farmers to no longer "follow the feelings of fertilization." It also made the effect of fertilization more pronounced, and the agricultural planting output increased significantly.

Land is the basic environment for crops to survive. Only with good soil quality, can crops grow well, yield and quality become higher, and pay attention to soil health. One of the important links is how to carry out scientific fertilization operations, because Reasonable fertilization not only fails to increase production and efficiency, but also leads to a series of problems such as soil compaction and soil pollution. On the one hand, the application of the soil tester is to use scientific methods to detect soil nutrients, so that the technical department can obtain accurate soil nutrient data and let us know more about the land we cultivate; on the other hand, the technicians can use the soil nutrients. The specific data provided by the speedometer is lacking what to add to the combination of soil and fertilizer elements to achieve the rationality of fertilization.

The use of soil testing instrument to carry out soil testing and formula fertilization is an important part of modern development of intelligent fertilizer and precise fertilization. Because the soil properties of cultivated land vary widely in different parts of China, soil nutrient conditions are different. Therefore, formula fertilization by soil testing is the most effective means to realize fine fertilizer application and standardize fertilizer application. Especially after the application of the soil tester, the farmers will not need to apply fertilizer again. With the feeling of walking, farmers can apply the chemical fertilizer with the corresponding components according to the specific soil, thus effectively increasing the efficiency of fertilizer application, increasing the crop yield while reducing the pollution to the soil, solving the problem of reasonable fertilizer, and eliminating farmers' worries.

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