Which one of the following can be used as biofertiliser in cotton field ?
A
Azolla-Anabaena
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B
Streptococcus
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C
Azosphillum
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D
Azotobacter chroocoocurn
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Solution
The correct option is BAzotobacter chroocoocurn Cotton is a dicotyledonous crop. The best biofertiliser for cotton is Bacillus cereus and Azotobacter chroococcum. These are free-living N2 fixing bacteria and enhance the fertility of the soil.