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← GeographyWhich outcome occurs when intense tropical weathering increases soil acidity?
A)Cation exchange capacity declines sharply✓
B)Nitrogen fixation increases dramatically
C)Clay mineral formation accelerates rapidly
D)Organic matter decomposition decelerates rapidly
💡 Explanation
Increased acidity from weathering causes greater leaching of base cations (Ca, Mg, K), leading to a decrease in cation exchange capacity because these ions are displaced from soil colloids. Therefore, CEC declines, rather than alternatives which need less acidic and base-rich soil environments.
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