Drought is one of the major natural disasters in our country. In recent years, droughts in China have occurred frequently, and the impact on the economy and society has continued to increase. Soil moisture (moisture) is the most direct indicator of drought, and plays an important role in the growth of crops. Changes in soil moisture directly affect the growth and yield of crops. Soil moisture monitoring is one of the important basic information and decision-making basis for research on the law of water circulation, irrigation for agriculture and animal husbandry, development and utilization of water resources, and drought relief. The soil moisture meter can determine the moisture in the soil and provide data for the moisture analysis.
Soil moisture monitoring in China's water conservancy system is still mainly using traditional artificial soil drilling and drying methods to measure soil moisture content. Although this method can measure soil moisture content more accurately, it is labor-intensive, time-consuming and labor-intensive. Monitoring does not continuous. In order to achieve continuous automatic monitoring of soil moisture, reduce labor intensity, and save monitoring costs, research institutes and companies at universities at home and abroad have conducted a series of studies, such as the United States, Australia, Germany, Brazil and other countries, on soil moisture monitoring instruments. Great investment, but also has a strong strength.
Soil moisture measuring instrument is very important for soil research. Due to the spatial variability of soil structure and soil moisture, the soil moisture content in the same land is different. However, existing methods for automatic measurement of soil moisture exist in practical applications. Certain defects, or have their own advantages and disadvantages, in the actual application of how to accurately understand and understand the advantages and disadvantages of various monitoring technology methods, in a certain area, select the appropriate soil moisture monitoring equipment, is that we need to constantly understand in the work And need to have enough understanding of the technical characteristics of various monitoring instruments to achieve.
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