1. Editorial Announcement

   • P. F. J. van Burg
   • D. J. Higgins

   Announcement Pages: v - vi

2. Preface

   • S. K. De Datta
   • W. H. Patrick Jr

   OriginalPaper Pages: vii - vii

3. 1. The chemistry and biology of flooded soils in relation to the nitrogen economy in rice fields

   • DR Bouldin

   OriginalPaper Pages: 1 - 14

4. 2. Nitrogen transformations in flooded rice soils

   • DR Keeney
   • KL Sahrawat

   OriginalPaper Pages: 15 - 38

5. 3. Technologies for utilizing biological nitrogen fixation in wetland rice: Potentialities, current usage, and limiting factors

   • PA Roger
   • I Watanabe

   OriginalPaper Pages: 39 - 77

6. 4. Reappraisal of the significance of ammonia volatilization as an N loss mechanism in flooded rice fields

   • I R P Fillery
   • P L G Vlek

   OriginalPaper Pages: 79 - 98

7. 5. Denitrification losses in flooded rice fields

   • KR Reddy
   • WH Patrick Jr

   OriginalPaper Pages: 99 - 116

8. 6. Ammonium dynamics of puddled soils in relation to growth and yield of lowland rice

   • K Mengel
   • HG Schon
   • SK De Datta

   OriginalPaper Pages: 117 - 130

9. 7. The efficacy and loss of fertilizer N in lowland rice

   • Paul LG Vlek
   • Bernard H Byrnes

   OriginalPaper Pages: 131 - 147

10. 8. New developments in nitrogen fertilizers for rice

    • LJ Youngdahl
    • MS Lupin
    • ET Craswell

    OriginalPaper Pages: 149 - 160

11. 9. Improving nitrogen fertilization in mechanized rice culture

    • DM Brandon
    • BR Wells

    OriginalPaper Pages: 161 - 170

12. 10. Improving nitrogen fertilizer efficiency in lowland rice in tropical Asia

    • SK De Datta

    OriginalPaper Pages: 171 - 186