Question

blue green algae fix_______ and increase soil fertility​

Answer 1

Answer:

NITROGEN GAS

Explanation:

These nitrogen compounds mix with the soil and increase the fertility of soil. Some bacteria like rhizobium and blue green algae are able to fix nitrogen gas from the atmosphere to enrich the soil with nitrogen compounds and increase its fertility.

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Answer 2

Answer:

blue green algae fix nitrogen gas from the atmosphere to enrich the soil with nitrogen compounds and increase its fertility.