Richland soils are fine-loamy and are on toe slopes below areas of bedrock. Tygart soils are nearly level, somewhat poorly drained, and have more clay. Moderately well drained. Surface runoff is slow to rapid. Permeability is moderate above the fragipan and slow in the fragipan.
Water is perched above the fragipan during late winter and spring months.
Most areas of these soils are used for cultivated crops, including corn and wheat, meadow, and pasture. Original vegetation was deciduous hardwood forest. The series is of large extent. Jackson County, Ohio, 1981. The Omulga series was formerly included with the Otwell series.