Abstract
The nitrogen fixing bacterial group known as rhizobia are very important and are used as biological fertilizers for two main purposes; one is to fulfil the nutritional requirements of increasingly populated world and other to overcome the problems arising due to chemical fertilizers. Rhizobial bioformulations are in the market since more than a century and can be the solution for deficiency of nitrogen in our food and soils. Rhizobia maintain the soil fertility along with higher crop yields due to the capability of biological nitrogen fixation (BNF). Currently, various types of rhizobial biofertilizers are commercially available in the market all over the world for agricultural purposes. These can be solid carrier based formulations (organic and inorganic), liquid formulations (with and without additives), synthetic polymer based formulations or metabolite based formulations, but there still is a great room for improvement. However, over the years there have been subtle changes in the rhizobial inoculants in terms of production and application.
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References
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Arora, N.K., Verma, M., Mishra, J. (2017). Rhizobial Bioformulations: Past, Present and Future. In: Mehnaz, S. (eds) Rhizotrophs: Plant Growth Promotion to Bioremediation. Microorganisms for Sustainability, vol 2. Springer, Singapore. https://doi.org/10.1007/978-981-10-4862-3_4
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