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← GeographyWhich soil horizon distribution results when accelerated bioturbation homogenizes layers?
A)Decreased layering; poorly defined horizons✓
B)Thickened organic surface horizon (O)
C)Increased clay accumulation; lower layers
D)Distinct eluviation zone presence throughout
💡 Explanation
Increased bioturbation mixes existing soil layers due to organism activity; therefore, less distinct horizon layering results, because the mechanism of pedogenesis favors homogenization of the soil profile, rather than forming distinct O, A, B, and C horizons.
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