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Soil Science Society of America Journal Abstract -

Testing Chemical Criteria for Spodic Horizons on Podzolic Soils in Canada1


This article in SSSAJ

  1. Vol. 47 No. 5, p. 1052-1054
    Received: Dec 6, 1982
    Accepted: Apr 14, 1983

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  1. J. A. McKeague2,
  2. C. Wang2,
  3. G. M. Coen2,
  4. C. R. DeKimpe3,
  5. M. R. Laverdiere3,
  6. L. J. Evans4,
  7. B. Kloosterman2 and
  8. A. J. Green2



Application of chemical criteria of the spodic horizon to 220 Podzolic pedons from Canada excluded 157 of them from Spodosols. Failure of approximately 60% to meet the required ratio (0.2) of pyrophosphate-extractable (Fe + Al) to clay was the principal factor. The requirement that at least one-half of the dithionite-citrate extractable (Fe + Al) be extractable by pyrophosphate was not met by approximately 40% of the Podzolic pedons. Modified chemical criteria for the spodic horizons are proposed.

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