In collaboration with United States Department of Agriculture, Natural Resources Conservation Service, Pedosphere.com reproduced in 2001. The information for each Soil Order, Great Group and Subgroup in embedded within the key for the whole system. The current version, i.e., the tenth edition published in 2006, and the summary of changes to Keys to Soil Taxonomy can be from the NRCS site. Also, the previous versions of Keys to Soil Taxonomy are on the NRCS site. It is our intention to update the searchable version to the current version in the near future.
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