Multiple choice

Which of the following is a false statement regarding bio-fertilizers?

  1. A bio-fertilizer can symbiotically associate with plant roots.

  2. It maintains the natural habitat of the soil.

  3. Bio-fertilizers are cost-effective.

  4. Azolla is an alternative phosphorus source.

  5. Rhizobium inoculation is a well-known agronomic practice to ensure adequate nitrogen.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Azolla is a small, eukaryotic, aquatic fern having global distribution. Prokaryotic blue green algae Anabena azolla resides in its leaves as a symbiont. Azolla is an alternative nitrogen source. This association has gained wide interest because of its potential use as an alternative to chemical fertilizers.

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