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A. A. Abdullahi
F. J. Abubakar


Rhizobia inoculation has been established worldwide as a cheaper, more effective way of ensuring adequate nitrogen supply to legumes than even the application of nitrogen fertilizer. The development of rhizobia inoculant industries in many countries has largely been motivated by the desire to introduce legume species to new areas, where appropriate ones do not exist. Competition from naturally occurring populations of rhizobia is usually a significant factor determining the establishment of introduced rhizobia inoculant strains in the field. Application of commercial inoculants introduced to new environments is usually associated with tendencies of failure, mostly due to the nature of the indigenous strains such as their population large size, positional advantage, higher competitive ability in nodule occupancy, saprophytic survival, ability to stand bacteriophages or epiphytic bacteria and superior adaptation to local and environmental factors, such astemperature, pH and nitrate content. Hence, selective enrichment of legume rhizosphere with environmentally adapted and highly effective indigenous strains of rhizobia may be the only way to improve legume nodulation, N2 fixation and productivity under field conditions. There is need to follow standard procedures for obtaining the appropriate rhizobia for indigenous inoculant development, considering the legume genotype, environmental conditions and management practices to achieve the desired results. This will improve on the low yield of legumes, relative to their potential yields obtained by farmers due to low soil fertility, particularly in savanna zones through their influence on the legume growth, nutrition, and productivity. The review also highlighted how indigenous rhizobia provides an alternative to costly inorganic nitrogen fertilizers and commercial inoculants developed from rhizobia originating from over environments.Indigenous rhizobiacould ensurelegumes productivity and sustainabilitythrough their biological N2 fixation that reduces in the adverse environmental effects of inorganic nitrogen fertilizers such as soil acidification, release of greenhouse gases and contamination of nearby and underground water bodies.Thus, checking climate change, ensuring environmental safety, and supporting the ever-increasing human population through higher productivity of the legumes.

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Abdullahi, A. A., & Abubakar, F. J. (2022). SUSTAINABLE WAY OF IMPROVING GRAIN LEGUMES PRODUCTIVITYAGAINST FAILURE OF INTRODUCED RHIZOBIA INOCULANT. The Bioscientist Journal, 10(2), 167-180. Retrieved from


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