Question

Farmers have reported over 50% higher yields of rice by sing which of the following biofertiliser?

(a) Mycorrhiza

(b) Azolla pinnata

(c) Cyanobacteria

(d) Legume-Rhizobium symbiosis

Answer 1

Correct Option (b) Azolla pinnata

Explanation:

Anabaena azollae, a cyanobacterium living in the cavities of fern Azolla, fixes atmospheric nitrogen and releases it into the-leaf cavity of the fern. Farmers have reported over 50% higher yields by using Azolla pinnata.