Extended versions of papers from Kyoto Symposium, 1990. Reprinted from Plant and Soil, 141, 1992.
Biological nitrogen fixation for sustainable agriculture - a perspective; biological nitrogen fixation - investments, expectations and actual contributions to agriculture; biological N2 fixation in wetland rice fields; estimation and contribution to nitrogen balance; improving nitrogen-fixing systems and integrating them into sustainable rice farming; managing native and legume-fixed nitrogen in lowland rice-based cropping systems; biological nitrogen fixation in non-leguminous field crops; recent advances; potential for increasing biological nitrogen fixation in soybean; biological nitrogen fixation in mixed legume/grass pastures; biological nitrogen fixation in trees in agro-ecosystems; trends in biological nitrogen fixation research and application.