1. Adesemoye AO, Kloepper JW (2009) Plant–microbes interactions in enhanced fertilizer-use efficiency. Appl Microbiol Biotechnol 85:1–12
2. Aggani SL (2013) Development of bio-fertilizers and its future perspective. Sch Acad J Pharm 4:327–332
3. Amalraj ELD, Maiyappan S, Peter AJ (2012) In vivo and in vitro studies of Bacillus megaterium var. phosphaticum on nutrient mobilization, antagonism and plant growth promoting traits. J Ecobiotechnol 1:35–42
4. Archana D, Nandish M, Savalagi V, Alagawadi A (2013) Characterization of potassium solubilizing bacteria (KSB) from rhizosphere soil. Bioinfolet—A Quarterly J Life Sci 10:248–257
5. Arkhipova TN, Prinsen E, Veselov SU (2007) Cytokinin producing bacteria enhance plant growth in drying soil. Plant Soil 292:305–315