. An Ecological land classification framework for the United States . % Dry Vegetation Wet Figure 2—The relative position of vegetation and soil from dry to wet environments in relation to water conditions and the classification sys- tem of Cowardin and others (1979). The areas under the curves are not meant to depict areal extent of the categories. The vegetation element reported herein extends from dry (xeromorphic) communities to wet (hydromorphic) communities. The soil element extends from dry (aridic) to wet (hydric) situations. 11

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Keywords: ., bookauthor, bookcentury1900, booksubjectecology, booksubjectsoils