Soils Suborders

Card Set Information

Author:
mking_nu
ID:
134010
Filename:
Soils Suborders
Updated:
2012-02-09 10:10:30
Tags:
Biogeography Soils
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Description:
Exam 2
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  1. a horizon horizon that forms at or near the surface
    epipedon
  2. formed during long-continued use of the soil by humans
    anthropic
  3. organic epipedons that occur primarily in cool hmid regions of the world; saturated with water for less than 30 days a year
    Folistic
  4. high content of organic matter as in Folistic, but normally saturated with water for more than 30 days a year
    Histic
  5. dark colored surface organic horizon associated with grasslands
    melanic
  6. thick, dark colored, humus-rich suface horizon with a base saturation of 50% or more. Bivalent cations (Ca++, Mg++) are dominant on the exchange complex. Formed by underground decomposition of organic residues such as roots of grasses
    Mollic
  7. thin, light-colored organic horizon
    ochric
  8. human-made surface layer produced by long-continued manuraing
    Plaggen
  9. mineral soil material that is thick, dark colored, humus-rich, with less base sturation than Mollic epipedon
    Umbric

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