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ABSTRACT
A noncontacting soil resistivity probe, based on electromagnetic induction, was used to measure soil salinity. Good correlations were obtained between the apparent bulk soil conductivity measured by the instrument and the electrical conductivity of saturated paste extracts or the bulk electrical conductivity measured by the Wenner four-probe method. The electromagnetic induction technique provided less detailed information on salinity changes with depth than the other methods, but was faster and can provide a continuous record of salinity changes along a transect.
1 Contribution from the Saskatchewan Inst. of Pedology, Univ. of Saskatchewan, Saskatoon, Canada S7N 0W0, and the Research Branch, Canada Agriculture, Research Station, Swift Current, Canada S9H 3X2.
2 Saskatchewan Inst. of Pedology.
3 Research Station, Canada Agriculture, Swift Current.
Received for publication October 31, 1978. Accepted for publication March 23, 1979.
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