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The intermediate layer in a soil profile, beneath the A‐horizon and above the C‐horizon. The B‐horizon is dominated by the deposition (illuviation) of material leached from the A‐horizon, so it is a zone of accumulation and enrichment. It contains little organic material, and is usually more compacted than the A‐horizon because clay washed down from the A‐horizon fills many of the voids between particles. See also soil horizon.

Subjects: Environmental Science.

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