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Soil Science Society of America Journal Abstract -

Estimating Forest Soil Quality from Terrain Measurements of Apparent Electrical Conductivity


This article in SSSAJ

  1. Vol. 54 No. 1, p. 290-293
    Received: Apr 20, 1989

    * Corresponding author(s):
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  1. R. A. McBride ,
  2. S. C. Shrive and
  3. A. M. Gordon
  1. Dep. of Land Resource Science
    Dep. of Environmental Biology, University of Guelph, Guelph, ON N1G 2W1



A portable, noncontacting electromagnetic induction meter was employed to measure the apparent electrical conductivity (ECa) of nonsaline, medium- and coarse-textured forest soils on Manitoulin Island, Ontario. In simple linear regressions, bulk soil ECa was strongly correlated with ECe (saturated-extract electrical conductivity), as well as exchangeable Ca, exchangeable Mg, and cation exchange capacity. Within the limited study area, these soil characteristics were thought to be major determinants of forest soil quality for red oak (Quercus rubra L.) production. Multiple stepwise regression showed that variations in exchangeable Ca and total Kjeldahl N concentrations accounted for a large proportion of the variation in ECa meter response (R2 = 0.871). The potential of this geophysical terrain measurement method as an integrator of edaphic properties important to forest site productivity is discussed.

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