Humus is a concentration of decaying, organic matter in the B horizons of lateritic soils.

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Humus is a concentration of decaying, organic matter found in the A horizon of soils. The B horizon is typically composed of mineral material that has accumulated over time due to leaching from the overlying layers. Lateritic soils are characterized by a hard, iron-rich layer and are found in tropical and subtropical regions.

Humus Is a Concentration of Decaying, Organic Matter in the B