Accumulation in a lower soil layer of materials brought down from upper layers is:
A)illuviation
B)liquefaction
C)saltation
D)eluviation

Question

Quizplus · Accepted Answer

Illuviation is the accumulation of materials, such as clay, iron, and organic matter, in a lower soil layer. These materials are transported downward by water, gravity, or biological activity from upper soil layers, where they are formed or brought in by erosion or deposition. Illuviation results in soil horizons or layers of different color, texture, structure, and composition, and is an important factor in soil formation, fertility, and classification.

Accumulation in a Lower Soil Layer of Materials Brought Down