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← GeographyWhich process rapidly decreases soil fertility following tephra deposition?
A)Nutrient leaching by increased acidity✓
B)Enhanced microbial decomposition of organics
C)Increased nitrogen fixation by rhizobia
D)Formation of stable clay minerals
💡 Explanation
Nutrient leaching increases with tephra because the ash often contains high levels of sulfuric compounds, leading to increased soil acidity; therefore, soil nutrients become soluble and lost, rather than being stabilized or enhanced through soil processes.
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