Palopinto and Tarrant soils have sola less than 20 inches thick over a lithic contact of limestone bedrock and are above on hillsides and ridgetops. Set soils have fine-silty control sections and are above on knolls and escarpments. Thurber soils have clayey argillic horizons and are on similar or slightly lower positions. 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.
Water enters to soil rapidly when it is dry and cracked, and very slowly when it is moist.
Small grains, forage sorghums, and grain sorghums are the main crops. Native vegetation is mostly sideoats grama, vine-mesquite, Texas wintergrass, Arizona cottontop, buffalograss, mesquite, pricklypear, and condalia. Mainly in the Texas North Central Prairie, Rolling Limestone Prairie, West Cross Timbers and Grand Prairie. The series is extensive. Vertic Properties - Slickensides from 11 to 55 inches, more than 40 percent clay from the surface to greater than 40 inches, and cracks that open and close periodically.