http://websoilsurvey.nrcs.usda.gov/app/ National Cooperative Soil Survey-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. http://www.nass.usda.gov/index.asp The National Agricultural Statistics Service provides timely, accurate, and useful statistics in service to U.S. agriculture. http://wepp.mesonet.agron.iastate.edu/index.phtml Iowa Daily Erosion Project- Provides daily estimates of rainfall, runoff and soil erosion for the state of Iowa.