Which of the following plants is used as biofertiliser
Nostoc
Funaria
Volvox
Rhizopus
(a)Nostoc possess special type of cells called heterocyst for free $N_2$ fixation that why nostoc is biofertliser.
Biofertilizers include
What would happen if oxygen availability to activated sludge flocs is reduced ?
A water fern, which is used as a green manure in rice fields is
Mycorrhiza represents
Which disease is caused in children due to excessive use of nitrate fertilizers
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