Summary Note on Nitrogen Fixation, Legume Nodulation and Abiotic Factors Affecting Biological Nitrogen Fixation Inside the Soil

However nitrogen is one of the most important nutrient that plants require for healthy growth only plants of the legume family are able to fix their own nitrogen. They accomplished this through a symbiotic relationship with Rhizobium bacteria that naturally exist in the soil. In this regard many past researches has largely find out the plant flavonoid signals that induce bacterial nod gene expression and the return bacterial Nod signal that induces nodule formation. This inventory is mainly focused on the ways of the nitrogen fixation process particularly with biological nitrogen fixation through nodulation and legume symbiosis. Many literatures narrate the physiological and environmental factors for the success of nitrogen utilization with the legumes and this article highlighted legume nodulation for biological nitrogen fixation and its edaphic environmental stresses. Keywords: Nitrogen, Rhizobium, Nodules, Symbiosis, Legumes, Bacterial, Nutrient