The physical and chemical properties of soil and substrate are different, so the moisture sensors can not be used directly for measuring the substrate moisture due to the great errors.
土壤与基质的理化特性相差较大，土壤水分传感器测定基质含水率时有较大误差，不能直接用于基质含水率测定。
The physical and chemical properties of soil and substrate are different, so the moisture sensors can not be used directly for measuring the substrate moisture due to the great errors.
土壤与基质的理化特性相差较大，土壤水分传感器测定基质含水率时有较大误差，不能直接用于基质含水率测定。
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