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← GeographyWhich transformation accelerates soil horizon mixing by organisms?
A)Increased organic matter decomposition rate✓
B)Reduced clay fraction aggregation
C)Decreased soil moisture retention
D)Enhanced surface crust formation
💡 Explanation
Increased decomposition improves bioturbation via burrowing animals because they enrich soil layers rather than relying on deeper nutrients; therefore horizon mixing becomes rapid, rather than layers remaining segregated.
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