Question

Which of the following is pair of bio-fertilizers?
(a) Azolla and blue gree algae
(b) Nostoc and legumes
(c) Rhizobium and grasses
(d) Salmonella and E. coli

Answer 1

Answer:

here b is the correct answer

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Explanation:

Answer 2

Azolla and blue-green algae are a pair of biofertilizers.

• Azolla and blue-green algae are the pair of biofertilizers grown on the surface of streams and ponds in temperate regions.

• They both are having a symbiotic association which fixes the atmospheric nitrogen and giving the nutrients to the plants.

• Azolla and blue-green algae used as a fertilizer in rice fields.

• They both prevent the growth of weeds and increased the availability of phosphorus and nitrogen to the rice crops.