다공질 세라믹 추를 이용한 중량 토양수분함량 측정 센서의 성능 검증

A simple soil moisture measurement method based on the weight of soil cone was developed. Soil cone is a conical porous ceramic cup filled with soil. In the three soil samples (fine sandy soil, silt loam, and sandy loam), the soil moisture content by core method and FDR (Frequency domain reflectometry) method showed a linear relationship with the regression coefficients of 0.92 - 0.98 and 0.97 - 0.99, respectively. The volumetric moisture content of the soil inside the soil cone to the soil cone water weight and the FDR sensor value showed a relationship with regression coefficient of 0.96 and 0.97, respectively. The relationship between the soil cone weight and the FDR sensor value (r 2 = 0.99, p < 0.001) was highly significant. Therefore, it was possible to measure soil moisture content by weighing of soil cone.