Which of the following is a pair of biofertilizers?
A. Salmonella and E.coli
B. Rhizobium and grasses
C. Nostoc and legume
D. Azolla and BGA
Answer:D
Which of the following is a pair of biofertilizers?
A. Salmonella and E.coli B. Rhizobium and grasses C. Nostoc and legume D. Azolla and BGA