Sarnosa soils have coarse-loamy control sections. Shiner soils have weakly cemented sandstone within 20 inches of the surface. Moderately well drained. Permeability is very slow. Runoff is high on 3 to 5 percent slopes and very high on slopes greater than 5 percent.
Water enters the soil rapidly when it is dry and cracked and very slowly when it is wet.
Largely native rangeland. Native grasses are mainly little bluestem, sideoats grama, buffalograss, Texas wintergrass and silver bluestem. Woody plants are mesquite, huisache, hackberry and thorny brush. Pricklypear is an invader. Northeastern part of the Rio Grande Plain of Texas.