Vertical distribution of trace elements and their significance in some forest soils of Bangladesh
1983
Hassan, M.M. (Forest Research Inst., Chittagong (Bangladesh))
Soil samples were collected from the genetic horizons of three soil profiles representing three different landtypes. Trace elements in soil and in leaf samples were determined spectrometrically. It was observed that the vertical distribution of trace elements was related to the amount of clay rather than to the genetic soil horizons. The clay content in these profiles was the attribute of the alluvial parent material. Therefore, the redistribution of trace elements was not due to pedogenetic effects. The clay fraction contains higher amounts of trace elements in all the profiles. It was therefore assumed that the topsoil might be depleted of trace elements with the loss of clay by alluviation or by run-off. Trace elements/iron exide ratios of several soil samples show that the vertical distribution of trace elements in the profiles studied were not significant. It was also observed that in the studied profiles Mn and Ca content was higher but that of other elements was lower than the FAO's prescribed highest levels of total content of trace elements in soil
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