Alfisols
A soil order of the US soil classification. Alfisols are young, acid soils, with a clay-rich B horizon, commonly occurring beneath deciduous forests. See brown earth.
alfisols Quick reference
A Dictionary of Ecology (5 ed.)
... ( grey-brown podzolics ) Mineral soils that are grouped as an order. These soils have clay -enriched argic horizons , are alkaline to intermediate in reaction, with the base saturation in the B horizon more than 35 per cent, are usually derived from base-rich parent materials, and are drier than −15 bars moisture potential for at least three months when plants could grow. ...
alfisols Quick reference
A Dictionary of Plant Sciences (4 ed.)
... ( grey-brown podzolics ) An order of mineral soils that have clay -enriched or argillic B horizons ( see argic horizon ); are alkaline to intermediate in reaction, with the base saturation in the B horizon more than 35 per cent; are usually derived from base-rich parent materials; and are drier than -15 bars moisture potential for at least three months when plants could grow. Alfisols occur under deciduous woodland or grassland in humid areas of the world and are generally productive agricultural soils. Brown earths are the equivalent in...
alfisols Quick reference
A Dictionary of Geology and Earth Sciences (5 ed.)
... ( grey-brown podzolics ) An order of mineral soils that have clay -enriched or argillic B horizons ; are alkaline to intermediate in reaction, with the base saturation in the B horizon more than 35%; are usually derived from base-rich parent materials; and are drier than −15 bars moisture potential for at least three months when plants could...
Alfisols
alfisol Quick reference
A Dictionary of Geography (5 ed.)
... A soil order of the US soil classification . Alfisols are young, acid soils, with a clay-rich B horizon, commonly occurring beneath deciduous forests. See brown earth...
alfisol Quick reference
A Dictionary of Environment and Conservation (3 ed.)
... A type ( order ) of soil that typically develops beneath broadleaved forest . It has a much thicker A‐horizon than most other soils, because leaves and other litter decompose quickly during the mild, wet winters. The A‐horizon often has a white layer, indicating eluviation of nutrients into the soil. An alfisol also has a relatively thick B‐horizon where clay and plant nutrients accumulate by illuviation...
Comprehensive Soil Classification System
soil order
grey-brown podzolic
brown earth
US soil classification
soil classification
grey-brown podzolic Quick reference
A Dictionary of Geology and Earth Sciences (5 ed.)
...podzolic Soil-profile term describing eluviated , freely draining soils that have a distinctive clay -enriched B horizon . See also alfisols...
soil order Quick reference
A Dictionary of Environment and Conservation (3 ed.)
...order The highest level within the Comprehensive Soil Classification System . There are eleven soil orders: alfisols , andosols , aridisols , entisols , histosols , inceptisols , mollisols , oxisols , spodsols , ultisols , and vertisols...
grey-brown podzolic Quick reference
A Dictionary of Plant Sciences (4 ed.)
...A soil- profile term describing eluviated ( see eluviation ), freely draining soils that have a distinctive clay -enriched B horizon . The soil develops under temperate woodlands which have a moderate rainfall, and forms good pastureland after deforestation. See also alfisols...
soil taxonomy Quick reference
A Dictionary of Ecology (5 ed.)
...taxonomy The system of soil classification that was devised by workers in the US Soil Survey, within the USDA . It divides soils into twelve orders: alfisols , andosols , aridisols , entisols , gelisols , histosols , inceptisols , mollisols , oxisols , spodosols , ultisols , and vertisols . These orders are further subdivided into suborders, great groups, families, and soil series, defined by diagnostic horizons...
grey-brown podzolic Quick reference
A Dictionary of Ecology (5 ed.)
... eluviation ), freely draining soils that have a distinctive clay -enriched B horizon . The soil develops under temperate woodlands which have a moderate rainfall, and forms good pasture-land after deforestation. The term is obsolete under the USDA Soil Taxonomy. See also Alfisols...
brown earth Quick reference
A Dictionary of Plant Sciences (4 ed.)
...in the Inceptisols ). Brown-earth types of soil are very productive and, although their natural climax vegetation in humid, temperate latitudes is deciduous forest, they have been used extensively for agriculture. The soil type is common in southern England. See also alfisols...
