Redoximorphic iron and manganese accumulations and depletions have hue of 7.5YR, 10YR, or 2.5Y, value of 2 to 6, and chroma of 1 to 8. The Bt horizon is silty clay loam or silty clay in the upper part, and silty clay loam or silt loam in the lower part. Redoximorphic iron and manganese accumulations and depletions have colors similar to the range described in the B horizon. It is silt loam or, less commonly, silty clay loam. Clay content ranges from 20 to 30 percent.
Reaction ranges from moderately acid to neutral.
These are the Adair , Arisburg , Arispe , Biddle , Chase , Flanagan , Greenton , Grundy , Herrick , Ipava , Lagonda , Lamoni , Mahaska , Martin , Mayberry , Pawnee , Rutland , Seymour , Shorewood , Tina , and Wymore soils. Adair, Flanagan, Lagonda, Lamoni, Pawnee, Shorewood, and Tina soils have more than 8 percent sand in the lower part of the control section. Biddle soils have 5 to 15 percent exchangeable sodium in the subsoil. Chase and Martin soils have mollic epipedons greater than 24 inches thick. Greenton and Rutland soils average more than 30 percent clay in the lower part of the control section.