The biofertilizers are (a) Anabaena and Azolla (b) cow dung, manure and farmyard waste (c) quick growing crop ploughed under soil (d) none of these.

The biofertilizers are
(a) Anabaena and Azolla
(b) cow dung, manure and farmyard waste
(c) quick growing crop ploughed under soil
(d) none of these.
by

1 Answer

Answer :

(a) Anabaena and Azolla
by

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