Question

describe the role of blue green algae and bacteria in fertility of soil.

Answer 1

blue green algae fix the atmospheric nitrogen which increase the amount of nitrogen in soil hence fertility.
bacteria digest the waste material which act as manure.
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Answer 2

Hey mate!

Here's your answer!!

The process of conversion of nitrogen into other compounds and ammonia is known as nitrogen fixation. Or,

The process of conversion of atmospheric nitrogen into suitable usable nitrogen is known as nitrogen fixation.

Blue green algae(Cyanobacteria) act as biofertilizer. Biofertilizers are introduced in the soil. They helps in replenishing the nutrients in the soil which are then taken in by the plants .They have the ability to fix the atmospheric nitrogen.

Bacteria such as Rhizobium also have the ability to fix atmospheric nitrogen. Bacteria also help in decomposition of organic wastes and in doing that provide the nutrients to the soil which are then taken up by the plants.

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