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Advantages of Azolla : 1. It easily grows in wild and can grow under controlled condition also. 2. It can easily be produced in large quantity required as green manure in both the seasons – Kharif and Rabi. 3. It can fix atmospheric CO2 and nitrogen to form carbohydrates and ammonia respectively and after decomposition it adds available nitrogenfor crop uptake and organic carbon content to the soil. 4. The oxygen released due to oxygenic photosynthesis, helps the respiration of root system of th