| Popis: |
The land resource regions (LRRs) I and J encompass much of the southern transition from the forested east to the prairie west. In so doing, the transition is made from udic, to ustic, and in places aridic moisture regimes. Predominant soil orders include Alfisols, Mollisols, and Vertisols. Variation in soil orders is correlated to parent material and vegetation. Mechanisms behind the correlation of Alfisols with oak savannah and in general tree covered versus prairie landscapes as well as the formation of petrocalcic horizons are discussed. Distinctions between different subregions (Major Land Resource Areas) are emphasized, as well as distinctions with some neighboring LRRs. |
