الفهرس 
Introduction and aim of the workOnly 14 pages are availabe for public view
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Abstract
Soil is an important evidence in forensic science. Comparison between soil sample from the scene of a crime and that obtained from a suspect, when show identity, may establish that the suspect had visited the place. Similarly, soil evidence may serve an exclusionary purpose and exonerate the 1 nnocent. In the present work, 68 topsoil samples were collected randomly from four different environmental areas in Mansoura and Talkha cities, namely : industrial, urban, cultivated and Nile-shores areas. These soil samples were subjected to six different experimental techniques for soil analysis namely : density gradient technique 5trace elements analysis, X-ray diffraction analysis, saccharide contents, soil reaction (PH) and carbonate contents of soil. The results of each experimental technique were subjected to statistical analysis to assess the efficiency of each technique in the discrimination of soil samples. Our results have shown that the construction of density gradients by the procedure utilized in our study does give reproducible results and can therefore be used for the comparison and discrimination of soils from different localities in forensic science. Similarly, our results indicate that the determination of trace element contents provides a useful additional technique for the dicrimination of soils in criminal investigation.