The Twelve Orders of Soil Taxonomy
nrcs.usda.govSee also this very cool poster displaying a classification scheme many people probably don't know exists: https://www.nrcs.usda.gov/sites/default/files/2022-06/orders...
See also this very cool poster displaying a classification scheme many people probably don't know exists: https://www.nrcs.usda.gov/sites/default/files/2022-06/orders...