Much of the land is cultivated and little original vegetation still remains. About 16.5 million acres of alternating woodlands and prairies. There are sharp changes in the vegetation which are associated with different soil types and topography. Some hardwood trees grow here, along with a variety of native grasses. These soils are divided into several subgroups.
Common vegetation includes small trees, shrubs, cactus, weeds and grasses.
Soil types include sandy loam, clay and clay loam. About 24 million acres of rolling to mountainous terrain, from woodlands in the west to prairies in the east. Vegetation includes a combination of grasses, weeds and small trees. Soil composition is limestone-based and shallow. Upland soils are dark, calcareous clays and clay loams, mostly gravelly and stony.