1. Aarab S, Ollero J, Megías M, Laglaoui A, Bakkali M, Arakrak A (2015) Isolation and screening of inorganic phosphate solubilizing Pseudomonas strains from rice rhizosphere soil from Northwestern Morocco. Am J Res Commun 3:29–39
2. Abaid-Ullah M, Nadeem M, Hassan M, Ganter J, Muhammad B, Nawaz K, Shah AS, Hafeez FY (2015) Plant growth promoting rhizobacteria: an alternate way to improve yield and quality of wheat (Triticum aestivum). Int J Agric Biol 17:51–60
3. Ahmad MSA, Ashraf M (2011) Essential roles and hazardous effects of nickel in plants. In: Whitacre DM (ed) Reviews of environmental contamination and toxicology. Springer, New York, pp 125–167
4. Ahmad E, Khan MS, Zaidi A (2013) ACC deaminase producing Pseudomonas putida strain PSE3 and Rhizobium leguminosarum strain RP2 in synergism improves growth, nodulation and yield of pea grown in alluvial soils. Symbiosis 61:93–104
5. Alexander M (1978) Introduction to soil microbiology. Soil Sci 125:331