They have thinner mollic epipedons. In many places Canisteo and Harps soils form a convex shoreline rim around the Knoke soils. The competing very poorly drained Okoboji and Wacousta soils are commonly associated in the same depression with Knoke soils. 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.