1. Preface

   • J. K. Ladha

   EditorialNotes Pages: vii - vii

2. B. Ben Bohlool Dedication

   Announcement Pages: x - xi

3. Biological nitrogen fixation for sustainable agriculture: A perspective

   • B. B. Bohlool
   • J. K. Ladha
   • T. George

   ReviewPaper Pages: 1 - 11

4. Biological nitrogen fixation: Investments, expectations and actual contributions to agriculture

   • Mark B. Peoples
   • Eric T. Craswell

   ReviewPaper Pages: 13 - 39

5. Biological N₂ Fixation in wetland rice fields: Estimation and contribution to nitrogen balance

   • P. A. Roger
   • J. K. Ladha

   ReviewPaper Pages: 41 - 55

6. Improving nitrogen-fixing systems and integrating them into sustainable rice farming

   • I. Watanabe
   • C. C. Liu

   ReviewPaper Pages: 57 - 67

7. Managing native and legume-fixed nitrogen in lowland rice-based cropping systems

   • T. George
   • J. K. Ladha
   • D. P. Garrity

   ReviewPaper Pages: 69 - 91

8. Biological nitrogen fixation in non-leguminous field crops: Recent advances

   • Ivan R. Kennedy
   • Yao-Tseng Tchan

   ReviewPaper Pages: 93 - 118

9. Potential for increasing biological nitrogen fixation in soybean

   • Harold H. Keyser
   • Fudi Li

   ReviewPaper Pages: 119 - 135

10. Biological nitrogen fixation in mixed legume/grass pastures

    • S. F. Ledgard
    • K. W. Steele

    ReviewPaper Pages: 137 - 153

11. Biological nitrogen fixation in mixed legume-cereal cropping systems

    • K. Fujita
    • K. G. Ofosu-Budu
    • S. Ogata

    ReviewPaper Pages: 155 - 175

12. Biological nitrogen fixation in trees in agro-ecosystems

    • S. K. A. Danso
    • G. D. Bowen
    • N. Sanginga

    ReviewPaper Pages: 177 - 196

13. Trends in biological nitrogen fixation research and application

    • Junji Ishizuka

    ReviewPaper Pages: 197 - 209