This Natural Resources Conservation Service (NRCS) website provides essential details of the more than 20,000 soils series in the United States, as well as its Territories, Commonwealths, and Island Nations. The clear-cut descriptions can assist fieldworkers in identifying and classifying soils. Students and educators can learn about the typical pedons, soil characteristics, geographical...

From Alfisols to Vertisols, this substantial resource (.pdf format only) from the US Department of Agriculture's Natural Resources Conservation Service provides an in-depth treatment of soil taxonomy around the world. Published in 1999 (Second Edition), this Soil Taxonomy text includes 23 chapters, covering the basics of soil classification through the world distribution of orders and suborders....

At this website, the University of Idaho provides information and images of the twelve classifications of soil taxonomy. After learning about the soils, users can find world and United States maps illustrating where each are located. The website offers downloadable documents of the soil taxonomy text, maps and errata sheet for the second edition of _Soil Taxonomy, A Basic System of Soil...

This University of Florida website educates the public about soil texture, which is the distribution of sizes of mineral particles found in soils. After learning the basics about soil separates, students and educators can learn about the USDA textural triangle and the characteristics of the twelve textural classes. Researchers can discover how to determine the correct soil texture in the field....

The SoLIM (Soil Land Inference Model) Project, based in the Department of Geography at the University of Wisconsin-Madison, "is a new technology for soil mapping based on recent developments in geographic information science (GISc), artificial intelligence (AI), and information representation theory." Visitors can learn about the many limitations to the current soil survey and how SoLIM's approach...