The nitrogen fixing symbiotic organism present in Azolla is
Nostoc
Anabaena
Aulosira
Azospirillum
(b)Azolla pinnata contains symbiont Anabaena in its leaf cavities.
Which disease is caused in children due to excessive use of nitrate fertilizers
Which of the following groups of plants are highly useful in increasing soil fertility
Due to which of the following organism, yield of rice is increased
Which of the following cyanobacteria can fix atmospheric nitrogen?
$I.$ Anabaena
$II.$ Oscillatoria
$III.$ Nostoc
Choose the correct option
How do mycorrhizal fungi help the plants harbouring them ?
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