USDA Web Soil SurveyInteractive soil maps and data for more than 95 percent of the nation’s counties. Produced by the National Cooperative Soil Survey and operated by the USDA Natural Resources Conservation Service (NRCS).
Identify and communicate the color of soil in the field using Munsell Soil Color Charts. Soil color indicates the makeup of the soil within a given geographic area.
University of Idaho website Includes information and photographs of alfisols, andisols, entisols, gelisols, histosols, inceptisols, mollisols, oxisols, spodosols, ultisols, and vertisols.
