Ques. 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.
Answer:A
Ques. 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.