Which one of the following is used as a biofertilizer?

Which one of the following is used as a biofertilizer? Correct Answer Azolla

The correct answer is Azolla.

Key Points

• The major sources of Biofertilizers include Algae, Fungi, Cyano-bacteria & Pteridophytes like Azolla Pinnata.
• Azolla pinnata serves as a great biofertilizer for paddy crops (rice).
• It increases the nutrient uptake and grain yield of rice.

Additional Information

• Azolla is a free-floating aquatic fern (Pteridophyte).
• There are six species of Azolla – Azolla Carolina, Azolla nilotica, Azolla filiculoids, Azolla Mexicana, Azolla microphylla and Azolla pinnata.
• They are extremely reduced in form and specialized, looking nothing like the typical fern but more resembling duckweed or some mosses.
• It can be used as animal feed, human food, medicine, and water purifier.
• It is also used as a bio-fertilizer which improves soil fertility and boosting crop yields.