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Electric resistivity of some soil complexes
M Mostafa, Nasser Afify, Abdel-Fattah Gaber, Mohammed El-Oyoun

The electric resistivity of some soils was investigated from room temperature to ~700 K. The studied soils represent Assiut valley desert soils (S1) and farmland of Assiut University soils (S2). The temperature dependence of the electric resistivity is discussed; it was found to decrease with increasing temperature. The results indicate that the electric resistivity depends on ions and only to a small extent on electrons. Also, the electric resistivity values lie in the range of insulating materials. The results are supported by scanning electron microscope (SEM) analysis and a mechanical analysis.

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