Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 8th
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Give an account on different layers of soil. - Social Science

Answer in Brief

Give an account on different layers of soil.

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Layers of soil 

O – Horizon or humus This layer is dominated by organic material (leaves, needles, twigs, moss, and lichens)
A – Horizon or Top soil It is a part of top soil composed of organic matter mixed with mineral matter.
E – Horizon or Elevated layer E – stands for elevated layer. This layer is significantly leached of clay, iron, and aluminum oxides, which leaves a concentration of ore.
B – Horizontal or sub-soil This layer reflects the chemical or physical alternation or parent material. Thus iron, clay, aluminium, and organic compounds are found accumulated in the Horizon.
C – Horizon or Parent Rock Partially weathered parent material accumulates in this layer.
R – Horizon or Parent Rock This layer consists of unweathered part of bed rock.
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Samacheer Kalvi Social Science Class 8th Tamil Nadu State Board
Chapter 2.1 Rocks and Soils
Evaluation | Q X. 3 | Page 94
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