The frost-free period is 180 to 220 days. These are the Lehmans , Mimbres , Mohave , and Stellar soils. Lehmans soils are underlain by acid igneous bedrock at depths of less than 20 inches and have 35 to 60 percent clay in the control section. Mimbres, Mohave, and Stellar soils do not have bedrock within 40 inches of the surface and have less than 15 percent coarse fragments in the control section. Livestock grazing is the principal use.
Native vegetation is creosotebush, tarbush, fluffgrass, black grama, tobosa, and mesa dropseed.
Southern and central New Mexico and Arizona. The soils are of moderate extent. MLRA is 40 and 42.