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  • 1 FIELD CROPS RESEARCH DEPT. NATIONAL RESEARCH CENTRE, Please ask the editor of the journal.
  • 2 FIELD CROPS RESEARCH DEPT. NATIONAL RESEARCH CENTRE, Please ask the editor of the journal.
  • 3 FIELD CROPS RESEARCH DEPT. NATIONAL RESEARCH CENTRE, Please ask the editor of the journal.
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A pot trial was carried out in the greenhouse of the National Research Centre during the summer season of 1999 to investigate the combined impact of Bradyrhizobium sp. (vigna) and Azotobacter vinelandii in the presence of various doses of chemical fertilizers, i.e. 25%, 50% and 100% of the recommended dose of NPK, on nodulation, growth parameters, seed yield and its components, and seed contents of protein, phosphorus and potassium of a local (Kawmy-1) and three exotic (VC-4, VC-9 and King) varieties of mungbean. The results indicated that there were no significant differences between the different varieties for nodule number per plant, while significant variations were obtained between both varieties and biofertilization treatments. The plants of the Kawmy-1 variety gave the shortest period of growth, the highest number of pods per plant and the highest values of harvest index and seed protein content. The King variety had the longest period of growth and the highest values for number of branches, seed yield, biological yield, seed index and seed phosphorus content. The inclusion of Azotobacter vinelandii significantly augmented various tested parameters, with the exception of seed yield, biological yield and potassium content, in comparison with Bradyrhizobium. Insignificant differences were found owing to the interaction between varieties, various levels of mineral fertilizers and types of biofertilizers with the exception of harvest index and seed phosphorus content.

  • Bergey's Manual of Determination Bacteriology (1998): 8th edition. The Williams & Wilkins Company, Baltimore.

    Bergey's Manual of Determination Bacteriology , ().

  • Chapman, H. D., Pratt, P. F. (1978): Methods of analysis for soil, plant and water. Univ. California, Div. Agic. Sci., pp. 12-19.

    Methods of analysis for soil, plant and water , () 12 -19.

  • Abd El-Lateef, E. M, Ashour; N. I., Farrag, A. A. (1997): Effect of foliar spray with urea and some micro-nutrients on mungbean (Vigna radiata L. Wilczek) growth, yield and seed chemical composition. Bull. NRC, Egypt, 23, 219-232.

    'Effect of foliar spray with urea and some micro-nutrients on mungbean (Vigna radiata L. Wilczek) growth, yield and seed chemical composition ' () 23 Bull. NRC, Egypt : 219 -232.

    • Search Google Scholar
  • Abd El-Malik, Y., Ishac, Y. Z. (1968): Evaluation of methods used in counting Azotobacters. J. Appl. Bacteriol., 31, 267-275.

    'Evaluation of methods used in counting Azotobacters ' () 31 J. Appl. Bacteriol. : 267 -275.

    • Search Google Scholar
  • Ashour, N. I., El-Hefni, M. Z., Darwish, G. G., Sharan, A. N., Selim, M. M., Abd El-Lateef, E. M., Yakout, G. M., Abou-Khadrah, S. H., Moslem, M. E. (1994): Effect of variety and plant density on mungbean (Vigna radiata L. Wilczek) yield at different locations in Egypt. Proc. 6th Conf. Agron., Al Azhar Univ., Cairo, Egypt, pp. 785-799.

    'Effect of variety and plant density on mungbean (Vigna radiata L. Wilczek) yield at different locations in Egypt ' , , .

    • Search Google Scholar
  • El-Bahrawy, S. (1983): Associative effect of mixed cultures of Azotobacter and Rhizobium japonicum on nodulation and symbiotic nitrogen fixation of soybean. Zentralblatt für Mikrobiologie, 138, 443-449.

    'Associative effect of mixed cultures of Azotobacter and Rhizobium japonicum on nodulation and symbiotic nitrogen fixation of soybean ' () 138 Zentralblatt für Mikrobiologie : 443 -449.

    • Search Google Scholar
  • Gomaa, A. M., El-Kholy, M. A. (1999): Partial replacement of chemical fertilizers by biofertilizers in mungbean (Vigna radiata L.) production. Ann. Agric. Sci. Moshtohor, 37, 2447-2462.

    'Partial replacement of chemical fertilizers by biofertilizers in mungbean (Vigna radiata L.) production ' () 37 Ann. Agric. Sci. Moshtohor : 2447 -2462.

    • Search Google Scholar
  • Gonzalez-Lopez, J., Salmeron, V., Martinez-Toledo, M., V., Bollesteros, F., Ramos-Cormenzana, A. (1986): Production of auxins, gibberellins and cytokinins by Azotobacter vinelandii ATCC 12837 in chemically-defined media and dialysed soil media. Soil Biol. Biochem., 18, 119-120.

    'Production of auxins, gibberellins and cytokinins by Azotobacter vinelandii ATCC 12837 in chemically-defined media and dialysed soil media ' () 18 Soil Biol. Biochem. : 119 -120.

    • Search Google Scholar
  • Lawn, R. J., Ahn, G. S. (1985): Grain Legume Crops, pp. 484-523.

    Grain Legume Crops , () 484 -523.

  • Snedecor, G. W., Cochran, W. G. (1982): Statistical Methods. 7th Ed. Iowa State Univ. Press, Iowa, USA.

    Statistical Methods , ().

  • Somasegaran, P., Hoben, H. J. (1985): Methods in Legume Rhizobium Technology. NIFTAL, Paid Maui HI, USA.

    Methods in Legume Rhizobium Technology , ().