These soils are on outwash plains and stream terraces. Slopes range from 0 to 12 percent. They formed in loess or other silty deposits 40 to 60 inches thick and in the underlying water-laid stratified fine and medium sand. The moderately well drained Toddville and the somewhat poorly drained Rowley series form a drainage sequence with the well drained Richwood series. The competing Pillot soils occupy contiguous areas where loess deposits are less than 40 inches thick, and the Tama soils occupy marginal areas where the solum is entirely within loess deposits.
Surface runoff is slow to moderately rapid.
Permeability is moderate in the solum and rapid in the substratum. Largely under cultivation to corn, soybeans, small grain, and forage. Native vegetation was prairie grasses with occasional scattered oak or hickory trees in the northern extremities. This soil is moderately extensive. La Crosse County, Wisconsin, 1947.