[1] Adesemoye, A. O., Torbert, H. A. and Kloepper, J. W. (2008b). Enhanced plant nutrient use efficiency with PGPR and AMF in an integrated nutrient management system. Can. J. Microbiol 54:876–886
[2] Agba, O. A., Ikenganyia, E. E. and Asiegbu, J. E. (2016). Responses of Mucuna flagellipes to Phosphorus Fertilizer Rates in an Ultisol. Int J Plant and Soil Sci 9: 1-9
[3] Ahemad, M. and Khan, M. S. (2012). Productivity of green gram intebuconazole-stressed soil, by using a tolerant and plant growth-promoting Bradyrhizobium sp. MRM6 strain. Acta Physiol Plant 34:245–54.
[4] Ahemad, M. and Kibret, M. (2014) .Mechanisms and applications of plant growth promoting rhizobacteria: Current perspective. J KingSaud Univ-Sci 26:1–20.
[5] Anderson, J. M. and Ingram, J. S. I. (eds) (1993). Tropical Soil Biology and Fertility: A Handbook of Methods (2nd edition) CAB international 221pp.
[6] Anikwe, M. A. N. , Agu, J. C. and Ikenganyia, E. E. (2016). Agronomic evaluation of four exotic tropical varieties of watermelon (Citrullus lanatus L.) in two agro-environments in Nigeria. International Journal of Plant &Soil Science 10(2):1-10.
[7] Anikwe, M. A. N., Ikenganyia, E. E., Egbonimale, J. and Oputah, C. (2017). Assessment of some tropical plants for use in the phytoremediation of petroleum contaminated soil: Effects of remediation on soil physical and chemical properties. International Journal of Plant and Soil Science 14(2):1-9.18.
[8] Anikwe, M. A. N. (2006). Soil quality assessment and monitoring: A review of current research efforts. New Generation Ventures Ltd., Enugu southeast Nigeria; 2006.
[9] Bais, H.P., Weir, T. L., Perry, L.G et al., (2006) The role of root exudates in rhizosphere interactions with plants and other organisms. Ann Rev Plant Biol 57:233–66.
[10] Banerjee, M. R. and Yesmin, L. (2002) Sulfur oxidizing rhizobacteria: an innovative environment friendly soil biotechnological tool for better canola production. Proc Agro environ, Cairo, Egypt1–7.
[11] Bray, R. H. and Kurtz, L. T. (1945). Determination of Total, Organic and Available Forms of Phosphorus in Soils. Soil Science91-96.
[12] Bremner, J. M. and Mulvaaney, C. S.(1982). Total nitrogen. In: Page, A.L. (eds.). Methods of Soil Analysis, Part 2. Chemical and Microbial Properties, Second edition Agronomy Series no. 9 Madison, WI, USA, ASA, SSSA.
[13] Cai, T., Cai, W., Zhang, J., Zheng, H., Tsou, A.M., Xiao, L., Zhong, Z. and Zhu, J. (2009). Host legume-exuded anti metabolites optimize the symboitic rhizosphere Mol Microbiol 73. 507 -517
[14] Cai, Z., Kastell, A., Knorr, D. and Smetanska, I. (2012). Exudation: An expanding technique for continous production and release of secondary metabolites from plant cell suspension and hairy root culture. Plant cell reports 31: 461 -477
[15] Carvalhais, L. C., Dennis, P. G., Fan, B., Fedoseyenko, D., Kierul, K., Becker, A., Von Wiren, N. and Borris, R. (2013). Linking plant nutritional status to plant- microbes interactions. PLoS one 8: e68555
[16] Chakraborty, A. P., Dey, P., Chakraborty, B et al. (2011) Plant growth promotion and amelioration of salinity stress in crop plants by a salt-tolerant bacterium. Rec Res SciTechnol 3:61–70.
[17] Chapman, H. D. (1982). Total Exchangeable bases. In. C.A. Black (ed.), methods of soil analysis, Part2. ASA, 9: 902-904 Madison, USA
[18] Congo, P. t., Dung, T. D., Hein, T. M., Hein, N.T., Choudhury, A. T., Kecskes, M. L. and Kennedy, I. R. (2009). Inoculant plant growth promoting microorganisms enhance utilisation of urea-N and grain yield of paddy rice in southern Vietnam. Eur.J. Soil. Biol. 45: 52-61
[19] Duarte, C. R., Neto, J. L. V., Lisboa, M. H et al (2004). Experimental study and simulation of mass distribution of the covering layer of soybean seeds coated in a spouted bed. Braz J ChemEng 21:59–67.
[20] Gee, G. W. and Bauder, D. (2002). Particle size analysis. In: Dane, J.H. and Topp, G.C. (eds.). Methods of Soil Analysis. Part 4, Physical methods. Soil sci. soc. Am.5:255-293.
[21] GENSTAT (2007). GENSTAT Release 7.2DE, Discovery Edition 3, Lawes Agricultural Trust, Rothamsted Experimental station.
[22] Giller, K. E., and Cadisch, G. (1995). Future benefits from biological Nitrogen fixation: An ecological approach to agriculture. Plant and Soil, 174, 255-277
[23] Gindrat, D. (1979). Alternariaradicina, an important parasite of marketgarden Umbelliferae. Revue Suisse de Viticulture, d’Arboriculturet d’Horticulture1979;11:257–67
[24] Glick, B. (2012). Plant growth-promoting bacteria: Mechanisms and applications. Scientifica 1-15.
[25] Glick, B. R., Todorovic, B., Czarny, J., Cheng, Z., Duan, J, et al. (2007) Promotion of plant growth by bacterial ACC deaminase. Crit Rev Plant Sci 26: 227-242.
[26] Goli, A. E. (1997). Conservation and Improvement of Bambara groundnut (Vigna subterranea [L.] Verdc). In: Heller J, F Begeman, J Mushonga (eds).Bibliographical Review. Proceedings of an International Workshop held at Harare, Zimbabwe, IPK/IPGRI: 4-10.
[27] Gomes, K. A. and Gomes, A. A.(1984) Statistical producers for Agricultural Research. 2nd edition. John Wiley and Sons. Inc. New York, U S .A
[28] Gururani, M. A., Upadhyaya, C. P., Baskar, V et al (2012). Plant growth promoting rhizobacteria enhance abiotic stress tolerance in Solanum tuberosum through inducing changes in the expression of ROS-scavenging enzymes and improved photosynthetic performance. J Plant Growth Regul 32:245–58.
[29] Guttman, D., McHardy, A. C. and Schulze-Lefert, P. (2014). Microbial genome-enabled insights into plant-microorganism interactions. Nat Rev Genet 15: 797-813
[30] Hebbar, P., Davey, A.G., Merrin J et al (1992). Pseudomonas cepacia, a potential suppressor of maize soil borne diseases: seed inoculation and maize root colonization. Soil BiolBiochem 24:999–1007
[31] Heijnen, C. E., Van Elsas, J. J., Kuikman, P. J et al (1988). Dynamics of Rhizobium leguminosarum biovartrifolii introduced to soil; the effect of bentonite clay on predation by Protozoa. Soil BiolBiochem 1988;20:483–8.
[32] Ikenganyia, E. E., Anikwe, M. A. N. and Ngwu, O. E. (2017). Influence of Rhizobacteria Inoculant Application Methods and Phosphate Fertilizer Rates onDry Matter Accumulation, Yield of Bambara Groundnut [Vigna subterranea (L.) Verdc] and Soil Total Nitrogen Content in a Degraded Ultisol in Southeast Nigeria. Agrotechnology 6: 165.
[33] Ikenganyia, E. E., Onyeonagu, C. C., Mbah, C. N., Azuka, C. V. and Aneke, I. (2014). Evaluation of the agronomic potentials of swine waste as a soil amendment. Africa Journal of Agricultural Research. Vol. 9 (51), pp. 3761-3765
[34] Karikari, S. K., Wigglesworth, D. J., Kwerepe, B. C., Balole, T. V., Sebolai, B. and Munthali, D. C. (1997). “Country Reports:Botwana. In: Heller, J., F. Begeman and J. Mushonga (Eds.). Conservation and improvement of Bambaragroundnut (Vigna subterranea [L.] Verdc.), Proceedings of an International Workshops held at Harare, Zimbarbwe. IPK/IPGRI, 11 – 19.
[35] Kennedy, I. R., Choudhury, A., Kecsk´es, M. L. (2004). Non-symbiotic bacterial diazotrophs in crop-farming systems: can their potential for plant growth promotion be better exploited? Soil BiolBiochem 36:1229–44.
[36] Linnemann, A.R. (1987). Bambara groundnut(Vigna subterranea (L.) Verdc.): A review.Abstr. On Tropical Agriculture. 12(7).
[37] Mahmood, Ahmad, Turgay, O˘guz Can, Farooq, Muhammad and Hayat, Rifat (2016): Seed biopriming with plant growth promoting rhizobacteria: a review. FEMS Microbiology Ecology, 2016, Vol. 92, No. 8
[38] Massawe, F. J., Dickson, M., Roberts, J. A., Azam – Ali, S. N. (2002). Genetic diversity in Bambara groundnut (Vigna subterranean [L.] Verdc.), landraces revealed by AFLP markers. Published on NRC Research PressWebsite http//:www.genome.nrc.ca, Canada.
[39] McLean, E. O. (1982). Soil pH and lime requirements. In: Page, A.L. (eds.). Methods of Soil Analysis, Part 2. Chemical and Microbial Properties, Second edition Agronomy Series no. 9 Madison, WI, USA, ASA, SSSA.
[40] Milus, E. A. and Rothrock, C. S. (1993). Rhizosphere colonization of wheat by selected soil bacteria over diverse environments. Can J Microbiol 39:335–41.
[41] Murphy, J. and Riley, J. P. (1962). A Modified Single Solution Method for determination of phosphate in natural waters. Anal. Chem. Acta27:31-36
[42] Nyoki, D., and Ndakidemi, P. A. (2013). Economic benefits of Bradyrhizobium japonicum inoculation and phosphorus supplementation in cowpea (Vigna unguiculata (L) Walp) grown in northern Tanzania Am. J. Res. Comm. 11,173–189.
[43] Onduru, D., De Jager, A., Muchena, F., Gachini, G., and Gachimbi, L. (2008). Exploring potentials of rhizobium inoculation in enhancing soil fertility and agroeconomic performance of cowpeas in sub-saharanAfrica: a case study in semi-arid Mbeere, Eastern Kenya. Am. Eurasian J. Sustain. Agric. 2, 185–197.
[44] Page, J. R., Miller, R. H., Keeney, D. R., Baker, D. E., Roscoe Ellis, J. R. and Rhoades, J. D. (1982). Methods Soil Analysis 2. Chemical and Microbiology Properties (2ndEdn.) Madison, Wisconsin, U.S.A, 1159 pp.
[45] Podile, A. R. and Kishore, G. K. (2006). Plant growth promoting rhizobacteria. In: Gnanamanickam SS (ed.). Plant Associated Bacteria. Dordrecht, The Netherlands: Springer, 2006, 195–230.
[46] Rhoades, J. D. (1982). Cation exchange capacity. In; Page, A.L.., Miller, R.H. and Keeney, D.R. (eds.). Methods of soil analysis, Part 2: Chemical methods. Agronomy Monograph no. 9, American Society of Agronomy Madison, Wisconsin, USA.
[47] Richardson, A. E. (2001) Prospects for using soil microorganisms to improve the acquisition of phosphorus by plants. Aust J PlantPhysiol 28:897–906.
[48] Spaepen, S., Vanderleyden, J., Remans, R. (2007) Indole-3-acetic acid in microbial and microorganism-plant signaling. FEMS MicrobiolRev 2007;31:425–48.
[49] Van Elsas, J. D. and Heijnen, C.E. (1990). Methods for the introduction of bacteria into soil: a review. BiolFert Soils 10:127–33.
[50] Van Elsas, J. D., Kijkstra, A. R., Govaert, J. M et al.(1986) Survival of Pseudomonas fluorescens and Bacillus subtilis introduced into two soils of different texture in field microplots. FEMS MicrobiolEcol 38:151–60.