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  9. Q57

UPPSC PCS 2023 · Question 57 of 150

The aquatic plant commonly used as bio-fertilizer in the water-logged rice field is:

General Knowledge

  1. AAzollaCorrect
  2. BLemna
  3. CWolfia
  4. DTrapa

Answer: A. Azolla

Explanation

Azolla, a type of an aquatic fern, is used as a biofertiliser in a paddy field due to its ability to fix atmospheric nitrogen. It helps to increase the nitrogen content of moist soil and water bodies, which can be used in increasing paddy yield.

Source: edurev.in solved-paper compilation (OSWAAL 15-Years UPPSC Prelims Solved Paper)

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