In a traiJ to discover the suitability of the new reclaimed soil in Toshky (high
temperature area in South Egypt) for cultivation. The chemical and physical
properties of this soil were tested. The main groups of microbial community, i.e. total bacteria, actinomycetes and fungi were counted as well as thermophilic bacteria. Results indicated that the growth of all soils microfiora was inhibited by increasing soil salinity. Clover inoculated with three strains of Rhizobium tritolii cultivated in this soil was failed because of its high salinity and nematode infection. Wheat inoculated with Azotobacter chroococcum, Azospirillum brasilence and Azorhizobia caulinodans had successfully grown in this soil after being reclaimed. Whe;:;t inoculated with Azorhizobium gave higher biomass and nitrogen content than that inoculated with the other diazotrophs. Bacterial inoculation approximately can save more than 50% of inorganic nitrogen fertilizer in wheat.