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The USDA Soil Orders

For each description, type the USDA Soil Order that corresponds to that order
Quiz by Kearsarge
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Last updated: October 5, 2021
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First submittedOctober 5, 2021
Times taken56
Average score66.7%
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Description
Soil Order
Clay-rich soil characterized by the presense of large amounts of swelling clays
Vertisol
Dryland soil with little organic matter and little leaching of nutrients, lots of salts
Aridisol
Soil of recent orgin. Soil horizon formation limited to thin A horizon.
Entisol
Soil containing permafrost close to the surface
Geilisol
Soil formed from volcanic ash
Andisol
Ancient soil defined by heavy weathering, oxidation of iron in sediment
Oxisol
Description
Soil Order
Soil dominated by buildup of organic matter
Histisol
Soil of recent orgin. Soil formation limited to A and a B horizon
Inceptisol
Soil dominated by thick and dark A horizon, relative lack of leaching of nutrients, grassland environments
Mollisol
Leached soil poor in nutrients and highly acidic most present in coniferous forests
Spodosol
Old soil with heavy weathering, heavy accumulation of clays below the surface. Frequent reddish color due to oxidation
Ultisol
Soil with accumulation of clays below the surface and somewhat leached, though not to the extent of older soils elsewhere
Alfisol
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