Slope gradients are mainly less than 1 percent but range up to 3 percent. The climate is dry subhumid with a mean annual rainfall of 28 to 35 inches. The Thornthwaite P-E indices are 40 to 50. Branyon soils have intersecting slickensides and gilgai microrelief. Krum and Branyon soils occur on similar surfaces.
Native vegetation is tall and midgrasses with a few scattered live oak, pecan, and hackberry trees.
Mainly in south-central Texas on ancient stream terraces of the Blackland Prairie and Edwards Plateau. The series is of moderate extent. These soils were formerly included with the Krum series.