Blue-green algae, particularly nitrogen-fixing species like Anabaena and Nostoc, are commonly used as biofertilizers in rice paddies. They perform nitrogen fixation, converting atmospheric nitrogen (N₂) into forms usable by plants (like ammonia), enriching the soil with this essential nutrient in the aquatic environment of rice fields.
Which one of the following organisms can serve as a biofertilizer for rice crop?
Asked in UPPCS Prelims 2000 · Topic: Biofertilizers (Nitrogen-fixing Biofertilizers: Non-symbiotic/Free-living (e.g., Azotobacter, Azospirillum, Cyanobacteria/BGA))
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