Due to which of the following organisms, the yield of rice is increased?
Correct answer: C. Anabaena
- A. Sesbania
- B. Bacillus popilliae
- C. Anabaena
- D. Bacillus subtilis
Explanation
Azolla plays a very important role in rice production. Azolla and its nitrogen-fixing partner, Anabaena, has been used as green manure to fertilize rice paddies and increase production. With the help of Azolla, rice can be grown year after year, several crops a year, with little or no decline in productivity; hence no rotation of crops is necessary.
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