Biological N fixation Biological N fixation converts gaseous nitrogen in the air (N2) to a form of nitrogen the plant can use, known as ammonium (NH4+). In legumes, symbiotic nitrogen fixation occurs when rhizobia invade the root hair and form a nodule on the root, see figure 1, Soybean Nodules. Rhizobia are a specific group … Continue reading Inoculation and Nodulation […]
