Time Domain Reflectometry for Measuring Bulk Soil Electrical Conductivity andComparison with the EM38 Instrument

摘要

The purpose of the report is to investigate the capability of Time DomainReflectometry (TDR) to measure water content and bulk soil electrical conductivity (EC sub a) simultaneously, and to compare these values with electromagnetic (EM38) induction measurements for five different soil profiles. The study sites all had a natural vegetation. Horizontal and vertical EM38 measurements were taken at intervals of 10 cm above soil surface to a height of 1.3 meter. TDR is found to be a quick method for determining an EC sub a profile in comparison with soil sampling.