Does all legumes fix nitrogen

Not all legumes fix nitrogen, but most have the ability to do so through a symbiotic relationship with nitrogen-fixing bacteria called rhizobia. These bacteria live in nodules on the roots of legume plants and convert atmospheric nitrogen into a form that the plants can use for growth. However, some legumes may not form these nodules or have non-nitrogen-fixing varieties. Thus, while the majority of legumes can fix nitrogen, it is not universally applicable to all species.