A) cow dung manure and farmyard waste
B) quick growing crop ploughed under soil
C) Anabaena and Azolla
D) none of these
Correct Answer: C
Solution :
Biofertilisers are the organisms which bring about nutrient available to cror plants either directly or through enrichment of soil, e.g., Anabciena, Azolla, Rhizobium, AzospiriUum, etc.You need to login to perform this action.
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