FORESTRY
SOIL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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bedrock
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topsoil
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parent material
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subsoil
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Detailed explanation-1: -This layer is rich in organic material and is known as the humus layer. This layer consists of both organic matter and other decomposed materials.
Detailed explanation-2: -“A” Horizon: This is the uppermost mineral layer of the soil profile and is commonly called topsoil. It has a relatively high organic content, normally ranging from about 4% to 15%. Owing to its position on the surface, it is the most heavily weathered horizon of the soil profile.
Detailed explanation-3: -Notes: B horizons: are commonly referred to as the subsoil. They are a zone of accumulation where rain water percolating through the soil has leached material from above and it has precipitated within the B horizons or the material may have weathered in place.
Detailed explanation-4: -The A horizon or topsoil is thus also called the humus layer.