Haplocalcid landscape
Washington Co., ID

These soils, formed in silty lacustrine sediments, contain an accumulation of calcium carbonate in the subsoil. Mean annual precipitation is ~10", but agricultural production is made possible by the availability of irrigation water. These soils are used to grow irrigated crops such as wheat, potatoes, corn, sugar beets, mint, and onions. The laminar sediments in which these soils form are well expressed in the lower part of the soil profile and can slow permeability and cause drainage problems.