C. W. Wood, H. A. Torbert and D. B. Weaver, “Nitrogen Fertilizer Effects on Soybean Growth, Yield and Seed Composition,” Journal of Production Agriculture, Vol. 6, No. 3, 1993, pp. 354-360.
 M. M. Tahir, M. K. Abbasi, N. Rahim, A. Khaliq and M. H. Kazmi, “Effects of Rhizobium Inoculation and NP Fertilization on Growth, Yield and Inoculation of Soybean (Glycine max L.) in the Sub-Humid Hilly Region of Rawalakot Azad Jammu and Kashmir, Pakistan,” African Journal of Biotechnology, Vol. 8, No. 22, 2009, pp. 6191-6200.
 W. Weisany, Y. Raei and K. H. Allahverdipoor, “Role of Some of Mineral Nutrients in Biological Nitrogen Fixation,” Bulletin of Environment, Pharmacology and Life Sciences, Vol. 2, No. 4, 2013, pp. 77-84.
 S. Hokmalipour and M. H. Darbandi, “Effects of Nitrogen Fertilizer on Chlorophyll Content and Other Leaf Indicate in Three Cultivars of Maize (Zea mays L.),” World Applied Sciences Journal, Vol. 15, No. 12, 2011, pp. 1780-1785.
 S. Sara, M. Morad and C. M. Reza. “Effects of Seed Inoculation by Rhizobium Strains on Chlorophyll Content and Protein Percentage in Common Bean Cultivars (Phaseolus vulgaris L.),” International Journal of Biosciences, Vol. 3, No. 3, 2013, pp. 1-8.
 R. Uchida, “Essential Nutrients for Plant Growth: Nutrient Functions and Deficiency Symptoms. Plant Nutrient Management in Hawaii’s Soils,” College of Tropical Agriculture and Human Resources, University of Hawaii at Manoa, 2000, pp. 31-55.
 C. Wu, Z. Q. Wang, H. L. Sun and S. L. Guo, “Effects of Different Concentrations of Nitrogen and Phosphorus on Chlorophyll Biosynthesis, Chlorophyll a Fluorescence, and Photosynthetic Rate in Larix olgensis Seedlings,” Frontiers of Forestry in China, Vol. 41, No. 4, 2005, pp. 31-36.
 D. J. Longstreth and P. S. Nobel, “Effects of Nitrogen, Phosphorus and Potassium for Gossypium hirsutum L.,” Plant Physiology, Vol. 65, No. 3, 1980, pp. 541-543.
 E. O. Leidi and D. N. Rodriguez-Navarro, “Nitrogen and Phosphorus Availability Limit N2 Fixation in Bean,” New Phytologist, Vol. 147, No. 2, 2000, pp. 337-346.
 A. Y. Kamara, J. Kwari, F. Ekeleme, L. Omoigui and R. Abaidoo, “Effect of Phosphorus Application and Soybean Cultivar on Grain and Dry Matter Yield of Subsequent Maize in the Tropical Savannas of North-Eastern Nigeria,” African Journal of Biotechnology, Vol. 7 No. 15, 2010, pp. 2593-2599.
 M. Q. Shahid, M. F. Saleem, H. Z. Khan and S. A. Anjum, “Performance of Soybean (Glycine max L.) under Different Phosphorus Levels and Inoculation,” Pakistan Journal of Agricultural Sciences, Vol. 46, No. 4, 2009, pp. 237-241.
 P. Gangasuresh, V. Muthuselvi, E. Muthulakshmi, S. Muthumari and G. Maniammal, “Synergistic Efficiency of Phosphate Solubilizer Associated with Nitrogen Fixer on the Growth of Soybean (Glycine max),”International Journal of Biological Technology, Vol. 1, No. 2, 2010, pp. 124-130.
 H. Lambers, M. W. Shane, M. D. Cramer, S. J. Pearse and E. J. Veneklaas, “Root Structure and Functioning for Efficient Acquisition of Phosphorus: Matching Morphological and Physiological Traits,” Annual Botanical, Vol. 98, 2006, pp. 693-713.
 W. Bekere and A. Hailemariam, “Influences of Inoculation Methods and Phosphorus levels on Nitrogen Fixation Attributes and Yield of Soybean (Glycine max L.). At Haru, Western Ethiopia,” American Journal of Plant Nutrition and Fertilization Technology, Vol. 2, No. 2, 2012, pp. 45-55. http://dx.doi.org/10.3923/ajpnft.2012.45.55
 S. Samavat, S. Samavat, S. Mafakheri and M. J. Shakouri, “Promoting Common Bean Growth and Nitrogen Fixation by the Co-Inoculation of Rhizobium and Pseudomonas fluorescens Isolates,” Bulgarian Journal of Agricultural Sciences, Vol. 18, No. 3, 2012, pp. 387-395.
 J. D. Hiscox and G. F. Israelstam, “A Method for the Extraction of Chlorophyll from Leaf Tissues without Maceration,” Canadian Journal of Botany, Vol. 57, No. 12, 1979, pp. 1332-1334. http://dx.doi.org/10.1139/b79-163
 D. I. Arnon, “Copper Enzymes in Chloroplasts, Polyphenoloxidase in Beta vulgaris,” Plant Physiology, Vol. 24, No. 1, 1949, pp. 1-15. http://dx.doi.org/10.1104/pp.24.1.1
 F. F. Teixeira, M. A. P. Ramalho and A. F. B. Abreu, “Genetic Control of Plant Architecture in Common Bean (Phaseolus vulgaris L.),” Genetics and Molecular Biology, Sao Paulo, Vol. 22, No. 4, 1999, pp. 577-582.
 D. Egamberdiyeva, D. Qarshieva and K. Davranov, “The Use of Bradyrhizobium to Enhance Growth and Yield of Soybean in Calcareous Soil in Uzbekistan,” Journal of Plant Growth Regulation, Vol. 23, No. 23, 2004, pp. 54-57.
 Z. Fatima, Z. Muhammad and C. Mfayyaz, “Effect of Rhizobium Strains and Phosphorus on Growth of Soybean (Glycine max) and Survival of Rhizobium and P Solubilizing Bacteria,” Pakistan Journal of Botany, Vol. 38, No. 2, 2006, pp. 459-464.
 A.-F. EI-Shaarawi, A. Z. Sabh, S. M. Abou-Taleb and A. E. Ghoniem, “Effect of Inorganic Nitrogen and Bradyrhizobium japonicum Inoculation on Growth and Yield of Soybean,” Australian Journal of Basic and Applied Sciences, Vol. 5, No. 10, 2011, pp. 436-447.
 R. K. Patra, L. M. Pant and K. Pradhan, “Response of Soybean to Inoculation with Rhizobial Strains: Effects on Growth, Yield, N Uptake and Soil N Status,” World Journal of Agricultural Sciences, Vol. 8, No. 1, 2012, pp. 51-54.
 M. S. Janagard, Y. Raei, K. Gasemi-Golezani and N. Aliasgarzad, “Soybean Response to Biological and Chemical Fertilizers,” International Journal of Agriculture and Crop Sciences, Vol. 5, No. 3, 2013, pp. 261-266.
 M. Zerpa, J. Mayz and J. Méndez “Effects of Bradyrhizobium japonicum Inoculants on Soybean (Glycine max (L.) Merr.) Growth and Nodulation,” Annals of Biological Research, Vol. 4, No. 7, 2013, pp. 193-199.
 M. S. Anjum, Z. I. Ahmed and C. A. Rauf, “Effect of Rhizobium Inoculation and Nitrogen Fertilizer on Yield and Yield Components of Mungbean,” International Journal of Agriculture and Biology, Vol. 8, No. 2, 2006, pp. 1560-8530.
 G. Montanaro, B. Dichio, C. Xiloyannis and G. Celano, “Light Influences Transpiration and Calcium Accumulation in Fruit of Kiwifruit Plants (Actinidia deliciosa var deliciosa)” Plant Science, Vol. 170, No. 3, 2005, pp. 520-527. http://dx.doi.org/10.1016/j.plantsci.2005.10.004
 X.-J. Zhou, Y. Liang, H. Chen, S.-H. Shen and Y.-X. Jing, “Effects of Rhizobia Inoculation and Nitrogen Fertilization on Photosynthetic Physiology of Soybean,” Photosynthetica, Vol. 44, No. 4, 2006, pp. 530-535.
 D. K. Singh and P. W. G. Sale, “Growth and Potentially Conductivity of White Clover Roots in Dry Soil with Increasing Phosphorus Supply and Defoliation Frequency,” Agronomy Journal, Vol. 92, No. 5, 2000, pp. 868-874.
 P. Gyaneshwar, G. N. Kumar, L. J. Parekh and P. S. Poole, “Role of Soil Microorganisms in Improving P Nutrition of Plants,” Plant Soil, Vol. 245, No. 1, 2002, pp. 83-93.
 F. K. Kumaga and K. Ofori, “Response of Soybean (Glycine max (L.) to Bradyrhizobia Inoculation and Phosphorus Application,” International Journal of Agriculture & Biology, Vol. 6, No. 2, 2004, pp. 1560 -8530.
 J. Mahamood, Y. A. Abayomi and M. O. Aduloju, “Comparative Growth and Grain Yield Responses of Soybean Genotypes to Phosphorous Fertilizer Application,” African Journal of Biotechnology, Vol. 8, No. 6, 2009, pp. 1030-1036.
 B. K. Abdul-Jabbar and H. M. Saud, “Effects of Phosphorus on Biological Nitrogen Fixation in Soybean Under Irrigation Using Saline Water,” Global Journal of Science Frontier Research Agriculture & Biology, Vol. 12, No. 1 2012, pp. 65-72.
 S. H. Chien, G. Carmona, R. G. Menon and D. T. Hellums, “Effect of Phosphate Rock Sources on Biological Nitrogen Fixation by Soybean,” Fertilizer Resources, Vol. 34, No. 2, 1993, pp. 153-159.