Ncert Exercises & Solutions

What is the principle underlying the use of cyanobacteria in agricultural fields for crop improvement?
1. Fix atmospheric nitrogen to make it available for the plants
2. Pest resistant
3. Increase the alkalinity of soil
4. None of these

Cyanobacteria are used in agricultural crop improvement because of their adicity to fix atmospheric nitrogen and makeit available to the plants. This improves the yield of the crops and also reduces the cost of application of nitrogen fertilisers. e.g., Anabena and Nostoc.

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