"Micro-organismes fixateurs d'azote." . . "Azote en agriculture." . . "Plantes fixatrices d'azote." . . "Cycle de l'azote." . . "Drobnoustroje wiążące azot." . . "Amélioration des plantes." . . "Micro-organisms, Nitrogen-fixing." . . "Nitrogen." . . "Fixation de l'azote." . . "Azote Fixation." . . "Azote - Fixation." . "Messung." . . . . . . . . . . . . . . . . . . . . . . . . . . . "Methods for evaluation biological nitrogen fixation" . . "The cultivation of diazotrophic microorganisms. Measurement of nitrogen fixation by direct means. Measurement of nitrogen fixation by indirect means. Methods for legumes in glasshouses and controlled environment cabinets. Non-legumes nodule systems. Methods for studying nitrogenase. Methods for studying enzymes involved in metabolism related to nitrogenase. Preparation and experimental use of leghaemoglobin. Methods for identifying strains of diazotrophs. Genetic studies with diazotrophs. Experiments with crop and pasture legumes: principles and practice. Production and quality control of legume inoculants. Forage grasses and grain crops. Nitrogen fixation in natural plant communities and soils. Sytems involving blue-green algae (cyanobacteria)." . "Methods for evaluating biological nitrogen fixation"@en . "Methods for evaluating biological nitrogen fixation" . . . . . . . . . . . . . "Azote métabolisme." . . "Stickstofffixierung." . . . . "Azot wiązanie." . . "Azoto Fissazione Misurazione." . . "Nitrógeno Fijación." . . "Azote." . .