USDA Web Soil Survey

OwnerUnited States Department of Agriculture - view all

Update frequencyunknown

Last updatedabout 1 year ago

Format

Overview

Web Soil Survey (WSS) provides soil data and information produced by the National Cooperative Soil Survey. It is operated by the USDA Natural Resources Conservation Service (NRCS) and provides access to the largest natural resource information system in the world. NRCS has soil maps and data available online for more than 95 percent of the nation’s counties and anticipates having 100 percent in the near future. The site is updated and maintained online as the single authoritative source of soil survey information.

AASHTO Horizon NRCS National Cooperative Soil Survey Natural Resources Conservation Service SSURGO STATSGO2 animal disposal available water capacity bivouac areas calcium carbonate canopy cover capability class cation exchange clay composting conductivity consistence corrosion crop yield crop yields dikes drainage class ecological classification embankments erosion excavations farm farmland fighting position flooding forest fragments frost geomorphic golf gravel gypsum helicopter landing hydric k factor landfills landscaping lawns levees linear extensibility liquid limit manure map unit mineral particles mineralogy moisture organic matter pH permeability plants plasticity index pond ponding pores productivty radioactive accumulation radioactive sequestration reclamation materials restrictive layer roadfill roads rubble disposal runoff salinity sand content sand source sanitary landfill septic tank absorption sewage sewage sludge sieve analysis silt slope sodium absorption soil soil map soil survey subsidence surface morphometry t factor temperature texture topsoil trafficability wastewater wastewater dosposal water table wind erodibility windbreak