title: Locus of nitrogen fixation in soybean nodules. Fixation by crushed nodules.
mesh_terms: D066298:In Vitro Techniques; D009584:Nitrogen; D009586:Nitrogen Fixation; D010945:Plants, Edible / Q000378:metabolism*; D011868:Radioisotopes; D013025:Glycine max
chemical_list: D011868:Radioisotopes; D009584:Nitrogen