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State one reason for adding blue-green a...

State one reason for adding blue-green algae to the agricultural soil.

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Blue green algae fix atmospheric nitrogen into organic forms and act as biofertilesers. Therefore, these are added to agricultural soil. Eg : Anabaena, Nostor. etc.
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XII BOARDS PREVIOUS YEAR-XII BOARDS-SET 1 [COMPTT]
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  3. State one reason for adding blue-green algae to the agricultural soil.

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