These soils are extensive on old erosional uplands in northcentral Texas and southcentral Oklahoma. Average annual precipitation is 26-32" and mean annual temperature is ~62-66 °F.

A and E horizon textures range from loamy very fine sand to fine sandy loam. Texture of the red argillic Bt horizon is clay, sandy clay, or clay loam with ~40% clay.

Native vegetation is post oak and blackjack oak trees with a ground cover of little bluestem, greenbrier, and annual grasses. Most Windthorst soils are in pastures of bermudagrass or in rangeland. Some areas are cultivated, with peanuts, sorghums, and small grains the main crops.

For more information on Windthorst soils, click here.

(scale is in inches)