Calibrating and using an EM31 electromagnetic induction meter to estimate and map soil salinity in the jarrah and karri forests of south-western ... article from: Forest Ecology and Management]

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Description:
Knowledge of the spatial distribution of soil salinity in areas of jarrah and karri forest where groundwater levels may be close to the surface is important when planning land use activities that may reduce leaf area and thus increase the risk of a rise in stream salinity. Hence this study aimed, firstly, to test whether a Geonics EM31 induction meter could be used to accurately estimate soil salinity in jarrah and karri forest soils. Secondly, to determine an appropriate method of surveying the stream zone with an EM31 to adequately represent the spatial variation in soil salinity. A comparison of EM31 meter estimates of soil apparent electrical conductivity (ECa) with average soil salinity profiles (EC"1":"5) to 6m depth across a broad range of sites resulted in good correlations in spring (R^2=0.66, n=164, p