Rushville and Virden soils formed in loess, average more than 35 percent clay in the particle-size control section, and are above El Dara soils. Moderately well drained Permeability is moderate. The potential for surface water runoff is high or very high. The seasonal apparent high water table is at a depth of 2.0 to 3.5 feet below the surface during the spring. Most of the steep areas are used for woodland.
Native vegetation is deciduous forest, mainly oak and hickory.
El Dara soils are subject to gully erosion. Extent is small. Adams County, Illinois, l974. Oxyaquic subgroup based on soil saturation above a depth of 40 inches. Well drained El Dara soils will be included in the Oxyaquic subgroup.