 Mollisols  Alfisols  Inceptisols  Entisols Example of an Udipsamment, which is an Entisol – A young poorly developed soil in a sandy glacial outwash plain.

 Mollisols - grassland soils with high base status  Albolls, Aquolls, Rendolls, Gelolls, Cryolls, Xerolls, Ustolls, andUdolls.  Alfisols - moderately leached soils with a subsurface zone of clay accumulation and >35% base saturation  Aqualfs, Cryalfs, Udalfs, Ustalfs, and Xeralfs.  Inceptisols - soils with weakly developed subsurface horizons  Aquepts, Anthrepts, Gelepts, Cryepts, Ustepts, Xerepts, and Udepts.  Entisols - soils with little or no morphological development  Wassents, Aquents, Arents, Psamments, Fluvents, andOrthents.

 Grassland soils with high base status  Albolls - wet Mollisols with a light- colored horizon formed through Fe reduction  Aquolls - Mollisols with a water table at or near the surface for much of the year  Rendolls - shallow Mollisols over calcareous parent material  Gelolls - Mollisols of very cold cimates (mean annual soil temperature <0°C)  Cryolls - Mollisols of cold climates  Xerolls - temperate Mollisols with very dry summers and moist winters  Ustolls - Mollisols of semiarid and subhumid climates  Udolls - Mollisols of humid climates

 Southeastern Minnesota  Shallow soil  Very dark A horizons overlying calcareous sedimentary PM  Humid Regions: Mean annual precipitation is approximately 35 inches.  Highly calcareous parent material  Not extensive in the US.

 Moderately leached soils with a subsurface zone of clay accumulation and >35% base saturation  Aqualfs - Alfisols with a water table at or near the surface for much of the year  Cryalfs - Alfisols of cold climates  Ustalfs - Alfisols of semiarid and subhumid climates  Xeralfs - temperate Alfisols with very dry summers and moist winters  Udalfs - Alfisols of humid climates

 Mollic Albaqualf  Central Missouri  Parent Material: loess with clay contents of 16% in the Ap horizon to 59% in the Bt horizon.  Abrupt increase in clay across the E- Bt horizon boundary.  Relatively fertile soils because of the high base saturation.  Clay-rich subsoil causes saturation during winter and spring  problems for their use and management.  Used for corn, soybean, sorghum production with artificial drainage

 Soils with weakly developed subsurface horizons  Aquepts - Inceptisols with a water table at or near the surface for much of the year  Anthrepts - Inceptisols with evidence of human habitation and farming  Gelepts - Inceptisols of very cold climates (mean annual soil temperature <0°C)  Cryepts - Inceptisols of cold climates  Ustepts - Inceptisols of semiarid and subhumid climates  Xerepts - temperate Inceptisols with very dry summers and moist winters  Udepts - Inceptisols of humid climates

 Lithic Eutrudept  Northern Michigan  Formed in glacial drift over limestone  Very shallow to bedrock.  Note the irregular boundary between the Bw horizon and the bedrock (R).  Although relatively fertile, too shallow for cultivation  Used for pasture land and timber production.

 Soils with little or no morphological development  Wassents - Entisols that are submerged for more than 21 hours every day  Aquents - Entisols with a water table at or near the surface for much of the year year  Arents - Entisols that have been disturbed and contain fragments of diagnostic horizons that are not arranged in any discernable order  Psamments - very sandy Entisols  Fluvents - alluvial Entisols commonly found on floodplains  Orthents - common Entisols that don't meet criteria of other suborders

 SW Wisconsin  Fluvial landscapes  Stratified layers form from deposition of fluvial sediment  Thick buried A horizon  Irregular decrease in organic carbon with depth.