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