Question:
The predominant mechanism of gaseous exchange in soil is
The predominant mechanism of gaseous exchange in soil is
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Gaseous exchange in soil:
- Predominantly by diffusion.
- Oxygen concentration is higher in the atmosphere than in soil.
- Carbon dioxide concentration is higher in soil than in the atmosphere.
- Predominantly by diffusion.
- Oxygen concentration is higher in the atmosphere than in soil.
- Carbon dioxide concentration is higher in soil than in the atmosphere.
Updated On: Aug 27, 2026
- Mass flow
- Contact exchange
- Ion exchange
- Diffusion
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Question:
This question tests knowledge of the mechanisms by which gases move through soil.
Soil aeration is essential for root respiration and microbial activity.
Step 2: Detailed Explanation:
The predominant mechanism of gaseous exchange in soil is Diffusion (D).
Gases move from regions of higher concentration to lower concentration.
Oxygen diffuses into the soil from the atmosphere, while carbon dioxide diffuses out.
Mass flow (A) is the movement of gases with the bulk flow of air or water, but it is not the predominant mechanism.
Contact exchange (B) and Ion exchange (C) are not related to gaseous exchange.
Thus, diffusion is the primary mechanism for gas movement in soil.
Step 3: Final Answer:
Thus, the predominant mechanism of gaseous exchange in soil is diffusion, which corresponds to option (D).
[0.5cm]
This question tests knowledge of the mechanisms by which gases move through soil.
Soil aeration is essential for root respiration and microbial activity.
Step 2: Detailed Explanation:
The predominant mechanism of gaseous exchange in soil is Diffusion (D).
Gases move from regions of higher concentration to lower concentration.
Oxygen diffuses into the soil from the atmosphere, while carbon dioxide diffuses out.
Mass flow (A) is the movement of gases with the bulk flow of air or water, but it is not the predominant mechanism.
Contact exchange (B) and Ion exchange (C) are not related to gaseous exchange.
Thus, diffusion is the primary mechanism for gas movement in soil.
Step 3: Final Answer:
Thus, the predominant mechanism of gaseous exchange in soil is diffusion, which corresponds to option (D).
[0.5cm]
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