Yield of paddy field can be increased by application of
Iron bacteria
Nostoc/Anabaena
Archaebacteria
Symbiotic bacteria
In paddy fields, _______ serves as an important biofertiliser
The main sources of biofertilisers are
$(a)$ Bacteria
$(b)$ Cyanobacteria
$(c)$ Fungi
$(d)$ Protists
How are microbes useful in biofertilisers ?
Which of the following cyanobacteria can fix atmospheric nitrogen?
$I.$ Anabaena
$II.$ Oscillatoria
$III.$ Nostoc
Choose the correct option
Biofertilisers