<prompt> Nitrogen fixation is done by which plant -LegumesNutsCerealesVegetables  <response>: Ans. is a i.e., LegumesProbably the most important form of agricultural nitrogen fixation is carried out by rhizobium-legume symbiosis in the root nodule of legumes.o Legumes are an important plant functional group since they can form a tripartite symbiosis with nitrogen fixing Rhizobium9 bacteria and phosphorus - acquiring arbuscular mycorrhizalfungi AMF. 