Ruark soils do not have a mollic epipedon and are in similar positions. Surface runoff is very slow or ponded. Water ponds on these soils for brief periods during the spring, and the water table commonly is at the surface or within 2 feet of the surface during the spring. Permeability is moderate. Most areas are used for cropland.
Principal crops are corn and soybeans.
Natural vegetation is hydrophytic grasses, reeds, and sedges. The extent is small. White County, Illinois, 1990. Aquic features - distinct mottles in the lower part of the mollic epipedon and dominant chroma of 2 in all horizons below the mollic epipedon. Competing series and other items will be updated later.