Which of the following is used as a biofertilizer for the cultivation of soybean crops?
A. Azotobacter
B. Nostoc
C. Azospirillum
D. Rhizobium
Answer:D
Which of the following is used as a biofertilizer for the cultivation of soybean crops?
A. Azotobacter B. Nostoc C. Azospirillum D. Rhizobium