Rich in organic matter. Typically has dark color. Also called zone of leaching . B horizon Subsoil. Also called zone of accumulation.
Bedrock lies below the soil profile.
Pedalfer These soils are rich in Al and Fe. These soils are rich in Ca . Laterite These soils have been depleted of nearly all elements except iron and aluminum oxides. They form in tropical climates with very high rainfall. The high rainfall has caused leaching of most of the elements and nutrients from the soil.