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← GeographyWhich soil outcome accelerates when earthworm bioturbation decreases drainage?
A)Increased anaerobic decomposition processes✓
B)Reduced mineral nutrient availability
C)Enhanced soil aggregate stability
D)Decreased hydraulic conductivity overall
💡 Explanation
Decreased bioturbation inhibits soil pore aeration, which increases anaerobic decomposition because the reduced presence of oxygen shifts metabolism within the soil. Therefore, decomposition proceeds under anaerobic conditions rather than aerobic conditions, which dominate when soil is well-aerated.
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