An improved method has been developed for determining the distribution of bulk soil electrical conductivity, EC a , through the soil from electromagnetic measurements taken at the soil surface with the Geonics Limited EM‐38 device. Induced electromagnetic conductivity readings taken with the EM‐38 device's coil configuration oriented parallel and then perpendicular to the soil surface provided sufficient information, when used with equations derived from geophysical instrumentation data, to produce a soil electrical conductivity‐depth profile. The simplicity of this method further enhances the praiticability of the newly developed electromagnetic technique for field measurements of salinity and for saline seep diagnosis.
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Corwin et al. (1982) studied this question.