Thornthwaite P-E indices from 50 to 66. These are the Brenham , Carbengle , Frelsburg , and Latium series. Brenham and Carbengle soils are on nearby similar landscapes, contain large amounts of calcium carbonate, contain less clay, and do not have slickensides. Frelsburg and Latium soils have dry color values of 5.5 or more within 12 inches of the surface in 50 percent of each pedon and are on adjacent steeper slopes. Moderately well drained.
Permeability is very slow.
Runoff is low on slopes less than 1 percent, medium on 1 to 3 percent slopes, and high on 3 to 5 percent slopes. Most areas have been cultivated in the past. Native vegetation was mid and tall prairie grasses with a few scattered trees. The series is of moderate extent. Properties of this soil appear to overlap those of the Houston Black series, but the two soils are on different kinds of landscapes.