Soil Layers and Horizons
The 'A' horizon is sometimes referred to as topsoil, while lower horizons are called subsoil.
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Photographer(s): Brady & Weil, 1999
Copyright: Brady, Nyle C.; Weil, Ray R., Nature and Properties of Soils, The, 12th, Copyright 1999. Electronically reproduced by permission of Peason Education, Inc. Upper Saddle River, New Jersey
