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22 Cards in this Set
- Front
- Back
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rock:lithosphere::soil: ________
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pedoshpere
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Soil Horizons A, E, and B are known as...
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Solum
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A verticle section of the soil through all its horizons
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Soil Profile
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A layer of soil that differs in properties and characteristics from adjacent layers, approx. parallel to the surface
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Soil Horizon
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Loose earth laterial above solid rock
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Regolith
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Surface Soil
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Topsoil (usually O and A horizons). A horizon is also called the plow layer.
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Soil layers that underlie the topsoil
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Subsoil
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A 3-D body of soil with lateral dimension large enough to permit the study of horizon shapes and relations.
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Pedon
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Chemically weathered rock from which soil forms.
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Parent Material
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Solid rock and horizon designation.
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Bedrock; R
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Bedrock that has been weathered in place to the point that it is porous.
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Saprolite
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Master Horizons
-Organic horizon on the soil surface |
O Horizon
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Master Horizons
-Horizon high in organic matter, but composed of mineral soil |
A Horizon
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Master Horizons
-subsurface horizon light in color due to leaching |
E Horizon
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Master Horizons
-Subsurface horizon from soil forming processes |
B Horizon
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Master Horizons
-Least weathered and deepest of all the horizons |
C Horizon
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Master Horizons
- Bedrock |
R Horizon
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4 soil components?
(ideal percentage) |
Solid
1) Mineral (45%) 2) Organic Matter (5%) Pore Space 3) Water (25%) 4) Air (25%) |
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-minerals that have not been altered chemically since depositoin
-result from decomposition of primary minerals |
-primary mineral
-secondary mineral |
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a transitory component of soil.
made up of decomposed plant and animal residues. |
organic matter
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functions of organic matter (4)
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1.Stabalizes soil structure
2.Increases the amount of water a soil can hold 3.Major source of plant nutrient 4.Main food/energy for soil orgs |
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Soil Air (5 things)
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-high spatial variability
-high temporal variability -High moisture content -High CO2 content -Loz O2 content |
