Explain the role of any five microbes which enriches soil nutrients.

Explanation

a. Rhizobium form root nodules in leguminous plants and fix atmospheric nitrogen into organic forms which is used by the plant as nutrient.
b. Azospiriliumis living bacteria fix atmospheric nitrogen and thus increasing nitrogen content of the soil.
c. Azetobacter is free living bacteria fix atmospheric nitrogen and thus increasing nitrogen content of the soil.
d. Mycorrhiza fungi symbiotically associasted with root of plants. Many memebrs of the genus Glomus form Mycorrhiza. It provides phosphorus to the palnts from the soil. Make the plant resistant to root borne pathogen and increase tolerance to salinity and drought.
e. Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial habitats. The help in nitrogen fixation, add organic matter to the soil and increase soil fertility. Ex. Anabaena, Nostoc and Oscillatoria etc.