Oxisols are an order in USDA soil taxonomy, best known for their occurrence in tropical rain forest, 15-25 degrees north and south of the Equator. They are classified as ferralsols in the World Reference Base for Soil Resources; some oxisols have been previously classified as laterite soils. ==Formation== The main processes of soil formation of ox...
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one of the 12 soil orders in the U.S. Soil Taxonomy. Oxisols form principally in humid tropical zones under rainforest, scrub and thorn forest, or ... [2 related articles]
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http://www.britannica.com/eb/a-z/o/43
Soil order (type) of the United States Natural Resources Conservation Service Soil Classification System. These soils are found in moist tropical environments. They are extremely weathered and very old. Layers within the profile have accumulations of mineral oxides and have a lack of base cations available for exchange.
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a thick, weathered soil of the humid tropics, largely depleted in the minerals that promote fertility, and characteristic of the Amazon and Congo basins.
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