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It is a nitrogen fixing bacteria blue green algae which are photosynthetic microorganisms, which help in the fixation of nitrogen.
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Blue-green algae are also called “cyanobacteria”. This microorganism is qualitatively more beneficial than the rest of the bacterial class. Hence they are called cyanobacteria.
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Not all blue-green algae help in nitrogen fixation. Some species of blue-green algae are Anabaena azollae, Anabaena fertilizer, Anabaena levenchari, Nostoc, Phormidium, Oscillatoria, Trichodesmium, etc., help in nitrogen fixation.
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These species of blue-green algae include both heterocyst-containing and non-heterocyst species; blue-green algae are very useful for paddy crops.
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