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Soil Science Society of America Journal Abstract -

The Influence of Pretreatment Forest Soil Variability on Interpretation of Posttreatment Results1


This article in SSSAJ

  1. Vol. 50 No. 6, p. 1594-1597
    Received: Jan 13, 1986

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  1. J. Melinda Slay,
  2. B. G. Lockaby,
  3. J. C. Adams and
  4. C. G. Vidrine2



Analysis of covariance procedures were used to evaluate differences in forest soil chemical properties among four site preparation techniques. Comparisons were made between analyses of variance adjusted with pretreatment soil chemical data used as covariates and unadjusted analysis of variance results. These comparisons indicated that failure to adjust for pretreatment spatial variation in soil chemical properties would lead to misinterpretation of the study results. This misinterpretation involved different rankings (for unadjusted vs. adjusted) of the site preparation treatment effects on soil N, P, K, Ca, and Mg concentrations.

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