Which soil horizon characteristic results from eluviation processes?

💡 Explanation

Eluviation involves the leaching of materials from the A horizon; this depletion of clays, organic matter, and oxides leaves a light-colored, nutrient-poor layer at the top of the soil profile, because the flow of soil water removes these materials, rather than depositing/transforming material in place.

• Which mechanism limits agricultural productivity in alluvial plains with high sedimentation rates?
• Which outcome will occur when a river's discharge decreases significantly across an active alluvial fan?
• Which outcome is worsened by thermocline breakdown during upwelling?
• Which risk escalates on steep slopes in Arctic regions undergoing active solifluction?
• Which outcome occurs when surface soil acidity increases above karst bedrock?
• Which outcome occurs more rapidly when granitic rock experiences increased jointing?