The degradation of herbicide atrazine (2-chloro-4-ethylamino-6-isopropylamino-1, 3, 5- triazine) by a soil bacterium is reported. The bacterium involved is a species of Nocardia, which utilizes the atrazine as the sole source of carbon and nitrogen. A new metabolite, 4- amino-2-chloro-1, 3, 5-triazine, of the degradation of atrazine in the presence of glucose has been identified. The results further substantiated that atrazine can be degraded by soil ...