Organic (O) horizon is absent in_________?
Correct answer: B. Arable soils
- A. Mollisols
- B. Arable soils
- C. Histosols
- D. Non-arable soils
Explanation
Cultivation commonly removes or incorporates the surface organic layer, so a distinct O horizon is generally absent in arable soils. Histosols, in contrast, are dominated by organic material and characteristically contain thick organic horizons.
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