Explain why azolla is grown in pabby field
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It acts as a renewable biofertilizer not only in paddy fields for growing the productivity of certain crops but also helps to influence soil fertility by decomposing itself rapidly and its nutrients are released in the water to enrich the soil as well as the field suitable for the next crop.
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Azolla is a blue-green algae (Cyanobacteria). It helps in nitrogen fixation and hence minimizing the requirements for the nitrogen fertilizers. It is also eco-friendly as compared to the chemical/artificial fertilizers. As paddy fields are wet, it provides good condition for their growth.
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