1. Editorial

   • K. Vlassak

   EditorialNotes Pages: 1 - 1

2. Differential colonization of Azospirillum lipoferum on roots of two varieties of rice (Oryza sativa L.)

   • M. G. Murty
   • J. K. Ladha

   OriginalPaper Pages: 3 - 7

3. Stimulation of root exudation of rice seedlings by Azospirillum strains: carbon budget under gnotobiotic conditions

   • T. Heulin
   • A. Guckert
   • J. Balandreau

   OriginalPaper Pages: 9 - 14

4. Nitrogen fixation and balance studies of rice soil

   • A. L. Singh
   • P. K. Singh

   OriginalPaper Pages: 15 - 19

5. Inoculation of rice with nitrogen-fixing bacteria —problems and perspectives

   • V. Rajaramamohan Rao
   • P .K. Jena
   • T. K. Adhya

   OriginalPaper Pages: 21 - 26

6. Yield response of spring wheat cultivars (Triticum aestivum and T. turgidum) to inoculation with Azospirillum brasilense under field conditions

   • Y. Kapulnik
   • Y. Okon
   • Y. Henis

   OriginalPaper Pages: 27 - 35

7. Inoculation of field-grown wheat (Triticum aestivum) with Azospirillum spp. in Brazil

   • V. L. D. Baldani
   • J. I. Baldani
   • J. Döbereiner

   OriginalPaper Pages: 37 - 40

8. Colonization of wheat seedling (Triticum aestivum) roots by Pseudomonas fluorescens and Bacillus subtilis

   • A. F. Dijkstra
   • G. H. N. Scholten
   • J. A. van Veen

   OriginalPaper Pages: 41 - 46

9. Role of Azospirillum brasilense nitrate reductase in nitrate assimilation by wheat plants

   • M. C. B. Ferreira
   • M. S. Fernandes
   • J. Döbereiner

   OriginalPaper Pages: 47 - 53

10. Peculiar effect of Azospirillum inoculation on growth and nitrogen balance of winter wheat (Triticum aestivum)

    • F. R. Warembourg
    • R. Dreessen
    • F. Lafont

    OriginalPaper Pages: 55 - 59

11. Nitrogen-fixing stem nodules on Aeschynomene afraspera

    • D. Alazard
    • E. Duhoux

    OriginalPaper Pages: 61 - 66

12. Effect of nitrogen on the yield response of Pennisetum americanum, Triticum aestivum and Zea mays to inoculation with Azospirillum brasilense under temperate conditions

    • G. W. O'Hara
    • M. R. Davey
    • J. A. Lucas

    OriginalPaper Pages: 67 - 72

13. Response of maize (Zea mays) to Azotobacter inoculation under fertilized and unfertilized conditions

    • A. Hussain
    • M. Arshad
    • E. Hussain

    OriginalPaper Pages: 73 - 77

14. Modelling of survival kinetics of some Bradyrhizobium japonicum strains in soils

    • A. Corman
    • Y. Crozat
    • J. C. Cleyet-Marel

    OriginalPaper Pages: 79 - 84

15. Use of the fluorescent antibody technique to characterize equilibrium survival concentrations of Bradyrhizobium japonicum strains in soil

    • Y. Crozat
    • J. C. Cleyet-Marel
    • A. Corman

    OriginalPaper Pages: 85 - 90

16. Effect of inoculation with different strains of Azospirillum brasilense on cotton (Gossipium barbadense)

    • M. Fayez
    • Z. Y. Daw

    OriginalPaper Pages: 91 - 95

17. Association of Azospirillum brasilense with pearl millet (Pennisetum americanum (L.) Leeke)

    • K. V. B. R. Tilak
    • N. S. Subba Rao

    OriginalPaper Pages: 97 - 102

18. Use of ¹⁵N isotope dilution for quantification of N₂ fixation associated with roots of kallar grass (Leptochloa fusca (L.))

    • K. A. Malik
    • Y. Zafar
    • E. Azam

    OriginalPaper Pages: 103 - 108