Potential use of soil microbes in sustainable crop production. The beneficial soil micro-organisms sustain crop production either as biofertilizers  or symbiont . They perform nutrient solubilisation which facilitate nutrient availability and thereby uptake [20, 21]. It improves the plant growth by advancing the root architecture . Their activity provides several useful traits to plants such as increased root hairs, nodules and nitrate reductase activity and . Efficient strains of Azotobacter, Azospirillum, Phosphobacter and Rhizobacter can provide significant amount of available nitrogen through nitrogen cycling . The biofertilizers produced plant hormones, which include indole acetic acid (IAA), gibberellins (GA) and cytokinins (CK) [25, 44]. Biofertilizers improve photosynthesis performance to confer plant tolerance to stress  and increase resistance to pathogens  thereby resulting in crop improvement .