The Sardak series consists of very deep, excessively drained soils formed in sandy alluvium. These soils are on nearly level to rolling flood plains and have rapid or very rapid permeability. Slopes range from 0 to 15 percent. Mean annual air temperature is 50 degrees F, and mean annual precipitation is 24 inches.
Reaction is neutral to moderately alkaline.
Depth to free carbonates is 0 to 10 inches. It is sand, loamy sand, loamy fine sand, fine sand, or fine sandy loam. A silty clay overwash phase is also recognized. It is loamy fine sand, loamy sand, fine sand, or sand. Stratification is evident throughout the C horizon.