The purpose of this study was to determine if elements other than Al and Fe are chelated by soil organic matter and illuviated to deeper soil horizons. |
Illuviated clay is frequently found in carbonate-rich soils of arid regions. |
The site has thick clayey soils, with subsurface horizons stiff with illuviated clay. |
In the deeper horizons where the pH decreases and with the accumulation of illuviated clay, the aggregates are more stable and persist. |