FORESTRY
SOIL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Your science teacher gives you a glass jar filled with water, decaying material, topsoil, dirt, and small rocks. She has the image of the soil profile on the board. Which layer in the jar would you find at Horizon A?
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subsoil
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topsoil
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humus
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bedrock
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Explanation:
Detailed explanation-1: -Humus usually refers to the natural decay of material such as leaves in the soil’s top layer.
Detailed explanation-2: -Horizon B is layer of soil which is not rich in humus but rich in minerals.
Detailed explanation-3: -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.
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