Rhizobium
... Rhizobium is a type of nitrogen-fixing bacteria that are capable for nitrogen-fixation. The primary distinguishing characteristic of rhizobium species is their ability to nodulate leguminous plants. ... Rhizobium also provides the major biological source of fixed nitrogen in agricultural soil. ... And since rhizobium is a source of fixed nitrogen, it could be of great help to aerial plants to help them grow. With these assertions, the researchers were motivated to conduct a study so as to determine the optimum temperature where rhizobium can be propagated for enhancing aeroponics technology.