Abstract:Thicknesses of three Mollisols (Tama. Elburn, and Drummer series), developed from Wiaconsinan-age material in a toposequence in Central Illinois, were considerably greater (18 to 68 cm) when their lower boundaries were determined by the depth of rooting of native perennial big bluestem (Andropogon gerardi) than when determined by the lower limit of the balm A combination of four criteria-structural development, significant clay accumulation, significant clay Alms, and the presence of completely unleached mater… Show more
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