Which soil horizon characteristic is reduced by leaching?

💡 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.

• Which consequence results when heavy tephra accumulation exceeds tree's limits?
• Which outcome occurs when rapid sediment deposition exceeds capacity on a submarine canyon fan?
• Which resulting ground feature indicates intense solifluction due to thawing permafrost on gentle alpine slopes?
• Which consequence occurs the instant a lava dome collapses within a stratovolcano structure?
• Which mechanism primarily reduces lake water salinity in closed-basin lake systems over geological timescales?
• Which process dominates the vertical salinity gradient development within a fjord following seasonal ice melt?