Thorp soils have both a mollic epipedon and an albic horizon. Somewhat poorly drained. The potential for surface runoff is slow to medium. Permeability is moderate in the upper part of the solum and ranges to moderately rapid in the lower part. Corn, soybeans, small grain, and forages for hay are the principal crops.
Native vegetation is mixed grasses and trees.
The extent is moderate. Kendall County, Illinois, 1941. A gravelly substratum phase is recognized. This soil will be investigated during MLRA update activities. Possibly a new series will be developed.