Estimation of biological N2 fixation and its contribution to nitrogen balance in wetland rice fields Role of biological nitrogen fixation in sustainable agriculture /Roger, Pierre-Armand Ladha, J.K. RIZIERE CYCLE DE L'AZOTE FIXATION BIOLOGIQUE DE L'AZOTE ARA LEGUMINEUSE ENGRAIS VERT APPLICATION AGRONOMIQUE METHODOLOGIE ECOLOGIE MICROBIOLOGIE DU SOL QUANTIFICATION N 15 IRRI 1990 text https://www.documentation.ird.fr/hor/fdi:30178 fdi:30178 Roger Pierre-Armand, Ladha J.K.. Estimation of biological N2 fixation and its contribution to nitrogen balance in wetland rice fields. In : . Role of biological nitrogen fixation in sustainable agriculture IRRI, 1990, 3-10 International Congress of Soil Science.Role of Biological Nitrogen Fixation in Sustainable Agriculture, 14., Kyoto (JPN), 1990/08/12-18 EN