Multiple choice

Which of the following is/are example(s) of biofertilizers?

  1. Blue green algae
  2. Ammonium nitrate
  3. Azospirillium

  1. 1 and 2 only

  2. 1 and 3 only

  3. 2 and 3 only

  4. 1, 2 and 3
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Bio-fertilizers provide eco-friendly organic agro-input and are more cost-effective than chemical fertilizers. Bio-fertilizers such as Rhizobium, Azotobacter, Azospirilium and blue green algae (BGA) have been in use for a long time. Ammonium nitrate is an example of chemical fertilizer.

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