| Clay illuviation is the process that has been most exhaustively considered in micromorphological studies. |
| Evidently, the simultaneous eluviation of hydrophilic organic substances and sesquioxides leads to a joint illuviation in the Ihf horizon. |
| In the subsoil, mottling shows us that the horizon, which has been compacted by clay illuviation, is subject to the process of pseudogleying. |
| The study also indicates that the illuviation of clay particles and their subsequent accumulation in the Bt horizons have occurred in sodic environment. |
| The soils of the study area are classified as Alfisols, characterized by a subsurface horizon in which silica has accumulated by illuviation. |
| Over millennia clay has accumulated in the subsoils as a result of weathering of primary minerals and clay illuviation. |
