Rhizobium is a genus of bacteria known for its ability to form symbiotic relationships with leguminous plants, such as soybeans and clover. These bacteria live in the root nodules of the plants, where they convert atmospheric nitrogen into a form that the plants can use for growth. This process is essential for soil fertility and helps reduce the need for chemical fertilizers. In return for the nitrogen, the plants provide Rhizobium with carbohydrates and a protective environment. This mutualistic relationship benefits both parties and plays a crucial role in sustainable agriculture, promoting healthy ecosystems and enhancing crop yields.