Which of the following is the pair of biofertilizers?(a) Azolla and blue-green algae(b) Nostoc and legume(c) Rhizobium and grasses(d) Salmonella and E. coli
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Answer is (a).
Azolla and blue green as function as nitrogen fixers and help in fertilizing the soil.
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Answer:
The correct answer is (a) Azolla and blue-green algae.
Explanation:
They are biofertilizers as they are used as nitrogen suppliers in agriculture. Also, they are responsible for changing the physical, chemical as well as biological properties of soil and various soil water interfaces.
They also affect the redox activity and enhance the formation of various organic acids in soil.
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