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Question
Azolla enriches rice fields with nitrogen due to its association with.
Azolla enriches rice fields with nitrogen due to its association with.
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Solution
The correct option is B Anabaena
Azolla is the most commonly used green manure for rice crop, due to its high growth rate, nitrogen-fixing capacity and ability to scavenge nutrients from soil and water. Azolla is a floating pteridophyte, which contains an endosymbiont the nitrogen-fixing cyanobacterium Anabaena . Widely cultivated in the Asian regions, Azolla is either incorporated into the soil before rice transplanting or grown as a dual crop along with rice. While Rhizobium is associated with roots of legume plantsSo, the correct answer is 'Anabaena'
Azolla is the most commonly used green manure for rice crop, due to its high growth rate, nitrogen-fixing capacity and ability to scavenge nutrients from soil and water. Azolla is a floating pteridophyte, which contains an endosymbiont the nitrogen-fixing cyanobacterium Anabaena . Widely cultivated in the Asian regions, Azolla is either incorporated into the soil before rice transplanting or grown as a dual crop along with rice. While Rhizobium is associated with roots of legume plants
So, the correct answer is 'Anabaena'
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