Question

Assertion:- Use of cyanobacteria in the paddy field increase the productivity of paddy.
Reason:- Cyanobacteria can fix atmospheric nitrogen in the soil​

Answer 1

Explanation:

Due to the important characteristic of nitrogen fixation, cyanobacteria have a unique potential to contribute to enhance productivity in a variety of paddy. The best known effect of blue-green algal growth on rice increased nitrogen availability resulting from nitrogen fixation but other effects have been reported