Biology · Ecology and Environment

In a soil profile, the maximum amount of organic matter or humus occurs in which layer?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1Equally distributed everywhere
2Middle layer (B-horizon)
3Upper layer (O or A-horizon)✓
4Lowermost layer (C-horizon)

Correct answer

Upper layer (O or A-horizon)

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