Microbes can be used to decrease the use of chemical fertilizers. Explain how this can be acomplished.

Explanation

`**" "`Rhizobium bacteria present in the root nodules of leguminous plants a symbiotic association and fixes atmospheric nitrogen into organic forms, which is used by the plant as nutrient.
`**" "`Free-living bacteria in the soil Azospirillum and Azotobacter can fix atmospheric nitrogen thus enriching the nitrogen content of the soil.
`**" "`MAny members of the genus Glomus (Fungi) form mycorrhizal symbiotic associations with higher plants in these, the fungal symbiont absorbs phosphorus from soil and passes it to the plant.
Cyanobacteria like Anabaena, Nostos, Oscillatoria are autotrophic microbes widely distributed in aquatic and terredtrial environments, which can fix atmospheric nitrogen, also add organic matter to the soil and increase its fertility.