Question:
Which one of the following is not a surface horizon (epipedon)?
Which one of the following is not a surface horizon (epipedon)?
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Soil Taxonomy epipedons:
- Ochric, Umbric, Mollic, Anthropic, Histic, Folistic, Melanistic.
- Plaggen is not a standard Soil Taxonomy epipedon.
- Ochric, Umbric, Mollic, Anthropic, Histic, Folistic, Melanistic.
- Plaggen is not a standard Soil Taxonomy epipedon.
Updated On: Aug 27, 2026
- Plaggen epipedon
- Ochric epipedon
- Umbric epipedon
- Anthropic epipedon
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Question:
This question tests knowledge of soil epipedons (surface horizons).
Step 2: Detailed Explanation:
Plaggen epipedon (A) is not a standard surface horizon in Soil Taxonomy.
The standard epipedons are:
- Ochric (B): Thin, light-coloured, low organic matter.
- Umbric (C): Dark, acidic, not as thick as mollic.
- Anthropic (D): Man-made epipedon.
Plaggen is a term used for a man-made surface horizon in some European soil classifications, but it is not a standard Soil Taxonomy epipedon.
Thus, Plaggen is not a standard epipedon.
Step 3: Final Answer:
Thus, Plaggen epipedon is not a standard surface horizon, which corresponds to option (A).
[0.5cm]
This question tests knowledge of soil epipedons (surface horizons).
Step 2: Detailed Explanation:
Plaggen epipedon (A) is not a standard surface horizon in Soil Taxonomy.
The standard epipedons are:
- Ochric (B): Thin, light-coloured, low organic matter.
- Umbric (C): Dark, acidic, not as thick as mollic.
- Anthropic (D): Man-made epipedon.
Plaggen is a term used for a man-made surface horizon in some European soil classifications, but it is not a standard Soil Taxonomy epipedon.
Thus, Plaggen is not a standard epipedon.
Step 3: Final Answer:
Thus, Plaggen epipedon is not a standard surface horizon, which corresponds to option (A).
[0.5cm]
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