As regards the total and available heavy metal content in soils, it was found that the amount of both total and available metal concentration was always higher in the Nandi Hills soil compared to the Darjeeling soil, which might be explained by the variation in the initial higher amounts of metals as well as the variation in pedogenic processes of soil formation where the dominant pedogenic process was
laterization in the case of the Nandi Hills soil, resulting an accumulation of sesquioxides and loss of silica and the reverse is the case with the Darjeeling soil, where the podzolization process is dominant in which accumulation of silica and loss of sesquioxides occurred.
The
laterization of tropical soils gives rise to a natural cementation caused by oxides and hydroxides of iron and aluminum.
This soil's high porosity and weak cementation between particles originate from two specific physicochemical geological processes: lixiviation and
laterization (Camapum de Carvalho and Mortari, 1994).
However, the rate showed insignificant association with any of the variables except stone
laterization (p>.05).
The soils used in the present study are lithomargic soils, which are products of
laterization. These soils are locally called "Shedi soils" and are available in varied colours.
Stroke time,
laterization of stroke, and type of stroke, such as ischemic (thrombotic, embolic) and hemorrhagic (hypertensive intracerebral), were recorded.
and Warm, O.: 1991, Quantitative geochemical approach to pedogenesis: importance of parent material reduction, volumetric expansion and eolian influx in
laterization. Geoderma, 51, No.