FORESTRY
SOIL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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O
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A
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B
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C
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E
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Detailed explanation-1: -Soils are named and classified based on their horizons. The soil profile has four distinct layers: 1) O horizon; 2) A horizon; 3) B horizon, or subsoil; and 4) C horizon, or soil base (Figure 31.2. 2). The O horizon has freshly decomposing organic matter-humus-at its surface, with decomposed vegetation at its base.
Detailed explanation-2: -"E", being short for eluviated, is most commonly used to label a horizon that has been significantly leached of its mineral and/or organic content, leaving a pale layer largely composed of silicates or silica. These are present only in older, well-developed soils, and generally occur between the A and B horizons.
Detailed explanation-3: -The O-Horizon. The A-Horizon or Topsoil. The E-Horizon. The B-Horizon or Subsoil. The C-Horizon or Saprolite. The R-Horizon. Recommended Video: Tensiometers. More items