14. Which of the following is also used as a Bio fertilizer? A.Urea B.Ammonia C.Uric Acid D.None of these
Answer: Option D Solution: Biofertilizers such as Rhizobium, Azotobacter, Azospirilium and blue green algae (BGA) have been in use a long time. Rhizobium inoculant is used for leguminous crops. Azotobacter can be used with crops like wheat, maize, mustard, cotton, potato and other vegetable crops.
