Frelsburg soils are on lower, smoother areas in the landscape. Permeability is very slow. Runoff is medium on 1 to 3 percent slopes, high on 3 to 5 percent slopes, and very high on slopes greater than 5 percent. Water enters this soil very rapidly when cracks are open, and very slowly when cracks have closed. Most areas have been cultivated in the past.
Native vegetation is mid and tall prairie grasses with a few scattered trees.
The series is of moderate extent. This soil was formerly included in the Ferris series. Cambic horizon - 4 to 12 inches. Calcic horizon - 12 to 70 inches. Vertic feature - Slickensides from 12 to 70 inches, greater than 40 percent clay throughout the pedon, and cracks that open and close periodically.