Mean annual temperature ranges from 59 degrees F. to 65 degrees F., and the mean annual precipitation is 8 to 10 inches. The frost-free period is 180 to 220 days. These are the Minlith and Onite soils. The Minlith soils lack a Bt horizon and are sandy-skeletal. The Onite soils are more than 60 inches deep.
Native vegetation is mainly black grama, bush muhly, threeawn, and annuals.
Southern New Mexico where it is moderately extensive. Dona Ana County Area, New Mexico, 1977. The zone from 0 to 2 inches. The zone from 2 to 18 inches.