Hapludalf, Typic
A representative soil profile of a Typic Hapludalf from Langlade County, NE Wisconsin. (Photo provided by R. Schaetzl.)
Typic Hapludalfs are the Hapludalfs fixed on freely drained soils that have an argillic horizon that does not have an abrupt upper boundary, that does not have interfingering of albic materials, that has a relatively high base saturation, and that has a loamy or clayey texture and is not composed entirely of thin lamellae. In addition, these soils are deep or moderately deep to hard rock, have a light colored plow layer, and do not have a thick epipedon with a sandy or sandy-skeletal particle-size class throughout. They do not have slickensides, wedge-shaped aggregates, a high linear extensibility, or wide cracks. An abrupt upper boundary of the argillic horizon and redox concentrations in the argillic horizon are properties shared with Albaqualfs and Albaquults and define intergrades to those great groups. If the upper 25 cm of the argillic horizon has aquic conditions for some time in normal years (or artificial drainage) and redox depletions with chroma of 2 or less, or saturation with water within 100 cm of the surface for extended periods, the soil is excluded from Typic Hapludalfs because these properties are shared with Aqualfs. A relatively low base saturation in the deeper horizons is a property shared with Ultisols and is used to define the intergrades to that order. Soils that have slickensides, wedge-shaped aggregates, a high linear extensibility, or wide cracks are excluded from the Typic Hapludalfs because these properties are shared with Vertisols.
Because most Hapludalfs have been cultivated extensively, many have lost their eluvial horizons. These soils formed principally in late-Pleistocene deposits or on a surface of comparable age. They are extensive soils in the Northeastern States, excluding New England, and in Europe, excluding most of Scandinavia. The vegetation on Hapludalfs in the United States was a deciduous broadleaf forest, but the soils are now mostly farmed. Temperature regimes are mesic or thermic.
For more information about soils and the Michigan State University-Department of Geography, visit:
project.geo.msu.edu/soilprofiles/
For additional information about soil classification, visit:
www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/cla...
Hapludalf, Typic
A representative soil profile of a Typic Hapludalf from Langlade County, NE Wisconsin. (Photo provided by R. Schaetzl.)
Typic Hapludalfs are the Hapludalfs fixed on freely drained soils that have an argillic horizon that does not have an abrupt upper boundary, that does not have interfingering of albic materials, that has a relatively high base saturation, and that has a loamy or clayey texture and is not composed entirely of thin lamellae. In addition, these soils are deep or moderately deep to hard rock, have a light colored plow layer, and do not have a thick epipedon with a sandy or sandy-skeletal particle-size class throughout. They do not have slickensides, wedge-shaped aggregates, a high linear extensibility, or wide cracks. An abrupt upper boundary of the argillic horizon and redox concentrations in the argillic horizon are properties shared with Albaqualfs and Albaquults and define intergrades to those great groups. If the upper 25 cm of the argillic horizon has aquic conditions for some time in normal years (or artificial drainage) and redox depletions with chroma of 2 or less, or saturation with water within 100 cm of the surface for extended periods, the soil is excluded from Typic Hapludalfs because these properties are shared with Aqualfs. A relatively low base saturation in the deeper horizons is a property shared with Ultisols and is used to define the intergrades to that order. Soils that have slickensides, wedge-shaped aggregates, a high linear extensibility, or wide cracks are excluded from the Typic Hapludalfs because these properties are shared with Vertisols.
Because most Hapludalfs have been cultivated extensively, many have lost their eluvial horizons. These soils formed principally in late-Pleistocene deposits or on a surface of comparable age. They are extensive soils in the Northeastern States, excluding New England, and in Europe, excluding most of Scandinavia. The vegetation on Hapludalfs in the United States was a deciduous broadleaf forest, but the soils are now mostly farmed. Temperature regimes are mesic or thermic.
For more information about soils and the Michigan State University-Department of Geography, visit:
project.geo.msu.edu/soilprofiles/
For additional information about soil classification, visit:
www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/survey/cla...