Before using traditional soil testing instruments to test soil moisture content, inspectors mainly used measurement methods such as dry weighing method, tensiometer method and dielectric property method to monitor soil moisture. However, when performing actual soil moisture testing work, you will find that these testing methods can hardly meet the current status of different measurement locations or different soil properties. Therefore, there is a need for more efficient and accurate soil moisture measurement instruments for research.
https://www.renkeer.com/soil-moisture-sensor-faq/
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