To establish a method for monitoring soil moisture and salinity levels in reclaimed agricultural fields, the apparent permittivity () of clayey soil sampled from Isahaya reclaimed land was determined by conducting drainage experiments in the laboratory under different moisture and salinity levels. The daily variations in  and bulk electrical conductivity (b) during the summer season were monitored by employing time domain transmissiometry (TDT) sensors horizontally installed at five

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... depths, and volumetric water content (), matric potential (m), soilwater electrical conductivity (w), and osmotic potential (o) were then estimated based on the both  and b. The values of , m, w, and o at different depths above 30 cm were successfully estimated and their corresponding variations during the entire summer season were established. However, values of the aforementioned parameters could not be easily estimated at depths below 30 cm owing to inadequate data regarding  vs. . Hence, the proposed method can aid in conducting coupled field monitoring of , m, w, and o for clayey soils.