The production of 13-N2 by 50-MeV protons for use in biological nitrogen fixation.
D009584:Nitrogen; D009586:Nitrogen Fixation; D011522:Protons; D011854:Radiochemistry / Q000295:instrumentation; D011868:Radioisotopes; D012988:Soil Microbiology
D011522:Protons; D011868:Radioisotopes; D009584:Nitrogen