Properties, Classification, and Upland Oak Site Quality for Residual Soils Derived from Shales, Phyllites, Siltstones, and Sandstones in Southwestern Virginia
註釋 Profiles of residual soils developed in materials weathered form shales, siltstones phyllites, and fine-grained sandstones in Rockbridge, Botetourt, Wythe, Smyth, and Washington Counties were characterized in order (1) to select soil properties for differentiating soils developed from rocks of different time-stratagraphic units, (2) to produce a uniform correlation of these soils, (3) to evaluate the influence of soil properties on upland oak site index, (4) to evaluate the taxonomic classes of Lithic and Typic Dystrochrepts as predictors of upland oak site index, and (5) to develop a multiple regression equation for predicting upland oak site index for soils classified as members of Lithic and Typic Dystrochrepts. Univariate and multivariate statistical analyses were used to evaluate differences among the parent materials, to select soil properties as differentiae, and/or to develop the regression equation for predicting site index for upland oak growing on these soils. Soils developed from rocks of the Chilhowee group contain lower amount of exchangeable bases. Therefore, we recommend that soils developed from these rocks be correlated as members of the Sylco and the proposed Sylvatus serie, members of Lithic and Typic Dystrochrepts, respectively ... 