Which of the following is common to Azospirillum, Anabaena, Nostoc and Oscillatoria
$N_{2}$-fixer microbes
Prokaryotic organism
Both $(a)$ and $(b)$
Eukaryotic organism
Organic forming does not include
Agricultural chemicals include
Which is correct about nitrogen fixation by legumes. They fix nitrogen through
Which disease is caused in children due to excessive use of nitrate fertilizers
How do microbes reduce the environmental degradation caused by chemicals ?