Slopes are 8 to 75 percent. Reaction - Moderately alkaline to very strongly alkaline. Loam, fine sandy loam, or sandy loam. Koynik soils have mean annual soil temperature of 47 to 52 degrees F. and are not moist for 10 days in the summer. Potosi soils have 50 to 70 percent pebbles and average 0 to 10 percent cobbles and stones in the particle-size control section.
Theriot soils are on mountains, hills, ridges, and pediments.
They formed in residuum and colluvium derived from limestone and dolomite. Slopes are 8 to 75 percent. Elevations range from 3,500 to 8,300 feet. The mean annual precipitation is 6 to 8 inches, the mean annual temperature is 50 to 56 degrees F., and the frost-free period is 130 to 170 days. These are the Pintwater and Crystal Springs soils.