Very poorly drained. Runoff is slow or ponded. Permeability is moderately slow. Most areas of this soil are cropped to corn and soybeans. Some is used for pasture or hay.
Wild vegetation is mostly sedges, reeds, and grasses.
In central and north-central Iowa and possibly southern Minnesota. The Knoke soils are of moderate extent. Calhoun County, Iowa, 1979. Changes include proposals made in Amendment 17 of Soil Taxonomy. Competing series and other updates will be made later.