Slope gradients are less than 1 percent. Surfaces are plane or concave. These soils formed in clayey alluvium. Mean annual air temperature ranges from 45 to 52 degrees F, and the mean annual precipitation ranges from 17 to 26 inches. These are the competing Hoven soils and the Bon , Egas and Farmsworth .
Hoven soils are in depressions.
Bon soils do not have a natric horizon and are on higher positions in the landscape. Egas soils do not have a natric horizon and are on slightly higher positions in the micro-relief. Farmsworth soils have thicker surface horizons and are leached of salts to greater depths and are on slightly higher positions in the micro-relief. Runoff is negible to high depending on slope. Permeability is very slow or slow.