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11 Cards in this Set

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Entisol
young soils, like those recently formed along a stream
Vertisols
High in clay, large "shrink-swell" capacity
Inceptisols
A young soil beginning to show horizon development (often range soils)
Aridsols
Soils with low organic component, in dry region
Mollisols
Fertile soils with a high organic content, very fertile
Spodosols
Acidic and sandy, developing in cool moist climates (eg around Great Lakes)
Alfisols
Moderately acidic clay soils, above average agricultural soils
Ultisols
Old soils which have been leached; low fertility
Oxisols
High in iron, highly acidic, low in nutrients, these soils are low in nutrients because most available nutrients are being utilized. The extremely high turnover rate (of matter and particularly nutrients) in the tropics makes these soils, when taken alone, highly infertile.
Histosols
High organic content, poorly drained, These, essentially, are wetland soils -- soils where a constant presence of water allows for the growth of water-tolerant plants, but breakdown of organic matter is slow due to the anaerobic condition of the soil.
Andisols
Volcanic deposition (e.g., lava flow)