“SOIL MOISTURE MEASUREMENT BY SOIL IMPEDANCE MEASURING METER : LABORATORY CALIBRATION AND FIELD EVALUATION”. Biological Sciences - PJSIR 45, no. 3 (April 22, 2002): 145–150. Accessed March 10, 2026. https://www.v2.pjsir.org/index.php/biological-sciences/article/view/1774.