Bacterial diversity and total viable counts of bacteria of the different soil samples from different localities in Khartoum State ( three regions: AL-Gaeli, Sharq EL-Neel and Omdurman North and eight sub-regions: Kunger, Gary, Wadi Gedad in AL-Gaeli region; Soba, AL-Elafoona and Um Dawan Ban in Sharq EL-Neel region; Karary and Khor Omer in Omdurman North region) were carried out. Soil physical and chemical characteristics (pH, EC, SP, soluble cations: Na, K, Ca, Mg and anion P, organic carbon, total nitrogen and soil texture in each of different studied sub-regions were measured. Soil samples...