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Questions and Answers
What is the main mechanism through which Azolla fixes nitrogen?
What is the main mechanism through which Azolla fixes nitrogen?
- Through a symbiotic relationship with rice plants
- Through the cyanobacterium Anabaena azolla in its dorsal leaves (correct)
- By attracting nitrogen-fixing insects to its leaves
- By absorbing nitrogen from the water through its roots
What is the role of Azolla in rice-duck farming?
What is the role of Azolla in rice-duck farming?
- Providing shade for ducks and fish, increasing weed growth, and reducing rice production
- Controlling weeds and pests, reducing chemical fertilizer use, and sustaining rice production (correct)
- Enhancing soil aeration, increasing the need for chemical fertilizers, and attracting pests
- Serving as food for ducks and fish, increasing the use of chemical fertilizers, and reducing rice production
Why is Azolla considered an ideal nutrient input in farming systems?
Why is Azolla considered an ideal nutrient input in farming systems?
- Due to its ability to attract beneficial microorganisms to the soil
- Because it acts as a natural pesticide and herbicide
- Due to its high nitrogen-fixing capacity, rapid multiplication, and quick nutrient release (correct)
- Because it requires minimal water and sunlight to grow
In what way does Azolla help in reducing environmental impact?
In what way does Azolla help in reducing environmental impact?
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What is the significance of Azolla in the context of rising costs of chemical fertilizers?
What is the significance of Azolla in the context of rising costs of chemical fertilizers?
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