Understanding the soil nutrient status is the basis for scientific fertilization. The main method of soil nutrient testing in the past is the laboratory routine analysis method, which is suitable for large-scale sample analysis for large-scale nutrient survey and recommended fertilization work, while the lack of experiments in grassroots rural areas. Room conditions, laboratory routine analysis methods can not be used, so the soil nutrient speedometer was developed on the needs of grassroots rural soil testing, which can diagnose a small amount of soil samples and can be detected online and at any time. Soil nutrient rapid measurement refers to rapid and convenient testing techniques and methods, as opposed to conventional analysis. In terms of test speed, the automated analysis technology based on conventional analysis has the fastest test speed, and the test cycle required for sample processing and laboratory analysis is the shortest. It is a generalized speed test, which represents the direction of test technology development. It has been widely used in the West, where technology is high, sample collection, transportation, and information feedback systems are developed. Suitable for testing and mobile services in the field, in the field, easy to use, which is commonly referred to as portable soil nutrient rapid measurement technology. The portable soil nutrient rapid measurement needs to be carried out in grassroots villages and even in the open air and in the field, and the environmental conditions are relatively poor. Therefore, there are high requirements in the following fields: field field measurement, high integration of instruments, reagents and reagents, easy to carry; fresh Sample measurement, the sample does not need air drying, grinding process; test speed, low cost; easy to operate, easy to master; test accuracy to meet the basic requirements of nutritional diagnosis, recommended fertilization. Â Wet Wipes
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