Argiudoll
A soil profile of a moderately well drained Argiudoll in the eastern part of the Great Plains. It has a mollic epipedon about 40 cm thick underlain by an argillic horizon, which extends to a depth of about 130 cm. The argillic horizon has prismatic structure with dark organic stains on prism faces. Pockets of white, soft calcium carbonate are below a depth of
about 130 centimeters. (Soil Survey Staff. 2015. Illustrated guide to Soil Taxonomy. U.S. Department of Agriculture, Natural Resources Conservation Service, National Soil Survey Center, Lincoln, Nebraska)
Argiudolls have a relatively thin argillic (clay accumulation) subsoil horizon or one in which the percentage of clay decreases greatly with increasing depth. The mollic (rich in humus and bases) epipedon commonly is black to very dark brown, and the argillic horizon is mostly brownish. Many of these soils are noncalcareous to a considerable depth below the argillic horizon. Some Argiudolls have a zone of accumulation of calcium carbonate below the argillic horizon. Argiudolls formed mostly in late-Wisconsinan deposits or on surfaces of that age. Many or most of these soils supported boreal forests during the Pleistocene that were later replaced by tall grass prairies during the Holocene. Argiudolls are extensive in Iowa, Illinois, and adjacent States.
To download the latest version of Soil Taxonomy, 2nd Edition, 1999, visit:
www.nrcs.usda.gov/resources/guides-and-instructions/soil-...
For additional information about soil classification using Keys to Soil Taxonomy, 13th Edition, 2022, visit:
[www.nrcs.usda.gov/sites/default/files/2022-09/Keys-to-Soi...]
To download the latest version of Keys to Soil Taxonomy, 13th Edition, 2022, visit:
[www.nrcs.usda.gov/resources/guides-and-instructions/keys-...]
For an Illustrated Guide to Soil Taxonomy, visit:
www.nrcs.usda.gov/sites/default/files/2022-06/Illustrated...
Argiudoll
A soil profile of a moderately well drained Argiudoll in the eastern part of the Great Plains. It has a mollic epipedon about 40 cm thick underlain by an argillic horizon, which extends to a depth of about 130 cm. The argillic horizon has prismatic structure with dark organic stains on prism faces. Pockets of white, soft calcium carbonate are below a depth of
about 130 centimeters. (Soil Survey Staff. 2015. Illustrated guide to Soil Taxonomy. U.S. Department of Agriculture, Natural Resources Conservation Service, National Soil Survey Center, Lincoln, Nebraska)
Argiudolls have a relatively thin argillic (clay accumulation) subsoil horizon or one in which the percentage of clay decreases greatly with increasing depth. The mollic (rich in humus and bases) epipedon commonly is black to very dark brown, and the argillic horizon is mostly brownish. Many of these soils are noncalcareous to a considerable depth below the argillic horizon. Some Argiudolls have a zone of accumulation of calcium carbonate below the argillic horizon. Argiudolls formed mostly in late-Wisconsinan deposits or on surfaces of that age. Many or most of these soils supported boreal forests during the Pleistocene that were later replaced by tall grass prairies during the Holocene. Argiudolls are extensive in Iowa, Illinois, and adjacent States.
To download the latest version of Soil Taxonomy, 2nd Edition, 1999, visit:
www.nrcs.usda.gov/resources/guides-and-instructions/soil-...
For additional information about soil classification using Keys to Soil Taxonomy, 13th Edition, 2022, visit:
[www.nrcs.usda.gov/sites/default/files/2022-09/Keys-to-Soi...]
To download the latest version of Keys to Soil Taxonomy, 13th Edition, 2022, visit:
[www.nrcs.usda.gov/resources/guides-and-instructions/keys-...]
For an Illustrated Guide to Soil Taxonomy, visit:
www.nrcs.usda.gov/sites/default/files/2022-06/Illustrated...