The depth to maximum clay content ranges from 20 and 30 inches. Reaction ranges from moderately acid in the upper horizons to slightly alkaline in the lower horizons. The Cg or C horizon has hue of 10YR or 2.5Y, value of 5 or 6, and chroma 1 to 4. Some pedons have redoximorphic colors with nearly equal proportions of high and low chroma. Average clay content ranges 18 to 25 percent.
Reaction ranges from slightly acid to moderately alkaline.
These are the Biddle , Flanagan , Herrick , Macksburg , Malvern and Timewell soils in the same family. Soils in closely related families are the Adair , Arisburg , Arispe , Chase , Greenton , Grundy , Lagonda , Lamoni , Mahaska , Martin , Mayberry , Pawnee , Rutland , Seymour , Shorewood , Tina , and Wymore soils. Biddle soils have 5 to 15 percent exchangeable sodium in the subsoil. Flanagan and the related Adair, Lagonda, Lamoni, Pawnee, Shorewood, and Tina soils average more than 10 percent sand in the lower part of the series control section. Herrick and Timewell soils have an AE or E horizon or a moist color value more than 3 in the upper part of the control section.