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Question

Which of the following is used as a biofertilizer for the cultivation of soybean crop?

A
Azotobacter
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B
Azospirillum
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C
Rhizobium
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D
Nostoc
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Solution

The correct option is D Rhizobium
Rhizobium is a soil bacterium, that can colonize the legume roots and fix the atmospheric nitrogen symbiotically. They are known as the most efficient biofertilizer as per the quantity of nitrogen fixed concerned. It is used as a biofertilizer for raising soybean crops because soybean needs a large amount of nitrogen for protein formation and Thus, it is the richest source of protein.
So, the correct answer is option C.

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