Abstract
AbstractTwo Gray‐Brown Podzolic soils and two Gray‐Brown Podzolic to Brunizem intergrade (transition) soils which occur near the forest‐prairie border in east‐central Illinois were studied to determine the effect of vegetation upon soil properties. All four profiles developed in loess and calcareous till of similar age and in the same climatic area so that soil differences are related to length of occupancy by trees, forest composition, and natural drainage.The Gray‐Brown Podzolic soils are more highly weathered and show more forest influence than the transition soils. This is indicated by higher organic carbon content and base status in the Al horizons; higher clay maxima, higher cation‐exchange capacities, lower Ca/Mg ratios, and lower base status in the B2 horizons; and less organic matter in the lower horizons of the Gray‐Brown Podzolic soils than in the transition soils.The relationships between soil properties and the vegetation sequence in north‐central United States are reviewed.
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