Azolla pinnata has been found to be an important biofertiliser for paddy crops. This quality is due to the presence of
A. N2 fixing bacteria
B. N2 fixing cyanobacteria
C. mycorrhizae
D. all of these
Answer:B
Azolla pinnata has been found to be an important biofertiliser for paddy crops. This quality is due to the presence of
A. N2 fixing bacteria B. N2 fixing cyanobacteria C. mycorrhizae D. all of these