Susan HillPostgate, J.R.2014-06-252014-06-251969J. Gen. Microbiol. (1969), 58, 277-285http://hdl.handle.net/123456789/3294Analyses, tests with isotopic nitrogen and tests for acetylene and isocyanide reduction, using both continuous and batch cultures, were made with seven strains of putative nitrogen-fixing bacteria and three local isolates. Only two (single strains of Mycobacterium flavum and Pseudomonas azotogensis) fixed nitrogen; the active pseudomonad differed in several respects from the organism originally reported. Other Pseudomonas, Nocardia and Azotomonas species and the three local isolates did not fix: some simulated nitrogen fixation in cultural tests most impressively, but proved simply to be very efficient scavengers of traces of fixed nitrogen.enArticle