While we all know that legumes “fix” nitrogen, have you ever seen nodules that actually do the “fixing? I recently pulled up a black eyed pea plant and I noticed that the roots were covered with the tiny nodules that clearly identify beans, clover, peas and even mesquite trees as legumes. These nodules are formed when the roots interact with a soil bacteria called rhizobia. Together, the roots and the bacteria create little nitrogen packets that the plant uses to nourish itself. These nodules ar