Fragiudalf
A soil profile of a Fragiudalf in Tennessee. This soil has a firm, dense, fragipan with prismatic structure below a depth of about 60 cm. The gray vertical penetrations of soil material consist of friable, eluvial silt coatings surrounding the browner, clay-enriched soil material of the dense prism interiors. Percolating water tends to move downward through the gray seams. (Soil Survey Staff. 2015. Illustrated guide to Soil Taxonomy. U.S. Department of Agriculture, Natural Resources Conservation Service, National Soil Survey Center, Lincoln, Nebraska)
Fragiudalfs have a fragipan (firm and brittle but not cemented layer) within a depth of 100 cm. They commonly have an argillic (clay accumulation) or cambic (minimal soil development) subsoil horizon above the fragipan. Redoximorphic features (gray and red mottled color pattern) are in many pedons, starting at a depth 50 to 100 cm. Ground water is perched seasonally above the fragipan, and a thin eluvial horizon commonly is directly above the fragipan.
Most Fragiudalfs in the United States are on gentle slopes and formed, at least in part, in silty or loamy deposits. The deposits are largely of late-Pleistocene age. The fragipan formed in an older buried soil in some areas. A fragipan seems to form if the burial was to a depth of about 50 to 75 cm. Temperature regimes are mostly cold to warm. In the United States, the native vegetation on these soils was primarily a broadleaf deciduous forest.
For additional information about soil classification, visit:
www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/cla...
Fragiudalf
A soil profile of a Fragiudalf in Tennessee. This soil has a firm, dense, fragipan with prismatic structure below a depth of about 60 cm. The gray vertical penetrations of soil material consist of friable, eluvial silt coatings surrounding the browner, clay-enriched soil material of the dense prism interiors. Percolating water tends to move downward through the gray seams. (Soil Survey Staff. 2015. Illustrated guide to Soil Taxonomy. U.S. Department of Agriculture, Natural Resources Conservation Service, National Soil Survey Center, Lincoln, Nebraska)
Fragiudalfs have a fragipan (firm and brittle but not cemented layer) within a depth of 100 cm. They commonly have an argillic (clay accumulation) or cambic (minimal soil development) subsoil horizon above the fragipan. Redoximorphic features (gray and red mottled color pattern) are in many pedons, starting at a depth 50 to 100 cm. Ground water is perched seasonally above the fragipan, and a thin eluvial horizon commonly is directly above the fragipan.
Most Fragiudalfs in the United States are on gentle slopes and formed, at least in part, in silty or loamy deposits. The deposits are largely of late-Pleistocene age. The fragipan formed in an older buried soil in some areas. A fragipan seems to form if the burial was to a depth of about 50 to 75 cm. Temperature regimes are mostly cold to warm. In the United States, the native vegetation on these soils was primarily a broadleaf deciduous forest.
For additional information about soil classification, visit:
www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/cla...