Question

Cyanobacteria helps farmers by (a) reducing the alkalinity of the soil (b) reducing the acidity of the soil

Answer 1

b. reducing the acidity of the soil

Answer 2

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Cyanobacteria are autotrophic microbes found in aquatic and Terrestrial environment .Most of these fix atmospheric nitrogen .

example :- nostoc ,oscillatoria and anaebena.

In paddy fields cyanobacteria serve as an important biofertilizer as they enrich the nitrogen content in the soil. They also add organic matter to the soil. Thus increasing the fertility .

Thus the application of cyanobacteria helps in improving agricultural output .

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