Nitrogen fixation is
Nitrogen $→$ Ammonia
Nitrogen $→$ Nitrates
Nitrogen $→$ Amino acids
Both $ (a) $ and $(b)$
Azolla enriches rice fields with nitrogen due to its association with
The main sources of biofertilisers are
$(a)$ Bacteria
$(b)$ Cyanobacteria
$(c)$ Fungi
$(d)$ Protists
Which of the following are the part or example of symbiotic mutualistic association?
$I.$ Yeast
$II.$ Rhizobium
$III.$ Mycorrhiza
$IV.$ Oscillatoria
Aquatic fern which is an excellent biofertilizer
Farmers have reported over $50\%$ higher yields of rice by using which of the following biofertilizer