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← GeographyWhich outcome develops when intense tropical rainfall alters surface soil profiles?
A)Nutrient depletion in the A horizon✓
B)Increased cation exchange capacity
C)Accumulation of humus within bedrock
D)Elevated soil pH at deep layers
💡 Explanation
Nutrient depletion occurs via leaching because heavy rainfall mobilizes soluble minerals from surface layers. Clay minerals and organic matter wash downwards via eluviation, therefore the upper A horizon loses fertility rather than having higher pH due to concentration of base cations.
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