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← GeographyWhich outcome is observed when heavy rainfall accelerates leaching in heavily logged tropical rainforests?
A)Subsurface aluminum toxicity increases sharply✓
B)Phosphorus availability notably rises locally
C)Decomposition rates within humic layers slow
D)Cation exchange capacity significantly rebounds
💡 Explanation
Increased aluminum toxicity is linked to more leaching of silica because the breakdown of organic matter leads to the release of aluminum. Therefore, increased rainfall accelerates soil acidification and aluminum dissolution rather than phosphorus increases under depleted forest cover.
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