Solum' includes:
Correct answer: D. Horizons A and B
- A. Horizons A1 and A2 only
- B. Horizon A only
- C. Horizons A2 and B only
- D. Horizons A and B
Explanation
The solum is the developed soil profile, usually comprising the A and B horizons and excluding the relatively unaltered C horizon. Hence, it includes horizons A and B.
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