3-DIMENSIONAL REPRESENTATION OF TUBULAR HORIZONS IN SANDY SOILS

Soil horizons are three-dimensional bodies and this is widely recognis ed. However, many soil descriptions are still based on the soil profil e and the move to three-dimensional diagrams to represent horizons or other soil phenomena is just starting. In the present study computer r econstruction and visualization techniques were used to illustrate the geometry of the illuvial Bh horizon in a buried podzol. The 3D comput er representation revealed a complex of tubular forms with diameters v arying from 10 to 25 cm and length around 100 cm. Similar tubular shap es are found in Australian podzols. (C) 1998 Elsevier Science B.V.