In paddy fields, _______ serves as an important biofertiliser
$Rhizobium$
$BGA$
$Glomus$
$Frankia$
Azolla is used as biofertilizer as it has
Some blue green algae can be used as biofertilizer as they are
Organic forming is the technique of raising crops through use of
Which of the following are the part or example of symbiotic mutualistic association?
$I.$ Yeast
$II.$ Rhizobium
$III.$ Mycorrhiza
$IV.$ Oscillatoria
Azolla enriches rice fields with nitrogen due to its association with