A) symbiotic nitrogen-fixers
B) non-symbiotic nitrogen-fixers
C) ammonifying bacteria
D) disease causing bacteria
Correct Answer: B
Solution :
Some free living (asymbiotic) nitrogen fixing bacteria like Azotobactor, Bacillus, Polymyxa, Beijerinckia, Clostridium have the capacity of fixing atmospheric nitrogen into nitrogenous substances, hence, increase soil fertility.You need to login to perform this action.
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