Vol. 10, Issue 5 (2021)

Author(s):
Zorinawmi Khiangte

Abstract:
Environmental issues over the increased level of reactive nitrogen in the atmosphere as a result of the production and usage of chemical fertilizers have prompted a re-evaluation of the value of biological nitrogen fixation (BNF). The fixation of nitrogen and photosynthesis form a foundation of any earthly existence. Because symbiotic nitrogen fixation is a major source of nitrogen, and different legume crops and pasture species can fix up to 300 kg nitrogen per hectare, the Rhizobium-legume symbiosis is superior to other nitrogen-fixing systems. Legumes' nitrogen-fixing properties benefit the environment by increasing soil fertility and reducing the need for inorganic fertilizers. Boron deficiency (B) adversely influences symbiotic relationships between legume and rhizobia and develops N2-fixing nodules. There has been great progress in boron treatment in the number of nodules, nodule size and nodule weight.