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Microbiology of Soils

Microbiology of Soils
Which of the following is not the biofertilisers producing bacteria?

Nostoc
Clostridium
Anabaena
Both (a) and (b)

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Microbiology of Soils
The transformation of nitrates to gaseous nitrogen is accomplished by microorganisms in a series of biochemical reactions. The process is known as

ammonification
nitrogen fixation
nitrification
denitrification

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Microbiology of Soils
Denitrification may be distinguished as

assimilative
blue baby syndrome
dissimilative
both (a) and (b)

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Microbiology of Soils
The groups of bacteria which have the ability to fix nitrogen from air to soil are

symbiotic
nonsymbiotic
none of these
both (a) and (b)

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Microbiology of Soils
The breakdown of cattle manure in biogas is accomplished by which of the following type of bacteria?

Transitional
All of these
Hydrolytic
methanogenic

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Microbiology of Soils
Nitrogen fixation refers to the direct conversion of atmospheric nitrogen gas into

ATP
nitrate
glucose
ammonia

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