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← GeographyWhich soil horizon characteristic is reduced by leaching?
A)Nutrient and salt concentrations✓
B)Organic matter decomposition rate
C)Capillary water-holding capacity
D)Cation exchange capacity (CEC)
💡 Explanation
Because water percolating through the soil causes leaching, mobile nutrients and soluble salts are carried downward, therefore reducing their concentrations in the upper horizon; rather than CEC, which involves bound ions in colloids, reduced by weathering not mere transportation.
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