Nitrogen fixation Posted on November 8, 2022August 1, 2023 by Tex Norwood The conversion of atmospheric nitrogen into plant-available forms by rhizobia bacteria living on the roots of legumes. Related Articles: Why Use VitazymeGlossary: MicronutrientsGlossary: Rhizobia bacteriaPeriodic Table of Crop Nutrients and DeficienciesSoils and Growing Mediums