Moist in some part for short intermittent periods following summer convection storms. Reaction - Mildly alkaline or moderately alkaline. Sandy clay loam, loam, or clay loam. In addition Aftaden soils have argillic horizons with less than 18 percent clay. Sparkhule soils are 14 to 20 inches to bedrock.
Zyplar soils are on rock pediments.
They formed in shallow residuum of rhyolitic ash-fall tuff and other extrusive igneous rocks. Slopes are 8 to 50 percent. Elevation are 3,500 to 4,500 feet. The climate is arid with cool winters and hot summers. These are the Akela , Shorim and Zalda soils.