Farmers have reported $50\%$ higher yield of rice by using biofertilizer
Azolla pinnata
Legume-Rhizobium symbiosis
Cyanobacteria
Mycorrhiza
Which of the following is common to Azospirillum, Anabaena, Nostoc and Oscillatoria
In paddy fields, _______ serves as an important biofertiliser
Green manure plants belong to
Relation between bacteria and legume having nodulated roots is that of
Why are cyanobacteria considered useful in paddy fields ?