Determination of soil salinity based on WET measurements using the concept of salinity index

We evaluated the Malicki and Walczak model (MW) and its appropriately modification (MMW) in the prediction of the electrical conductivity of the soil solution (sigma(p)), utilizing the WET dielectric sensor. In the MMW approach, the prediction of sigma(p) requires determination of the WET-based salinity index (X-s) and clay and sand contents of the soil. MMW appears to be more effective than MW in all cases except for the cases of finer soils when sigma(p) > 3 dS m(-1).