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Microbiology of Soils

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

glucose
ammonia
ATP
nitrate

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Microbiology of Soils
Assimilative denitrification is done by

plants
fungi
prokaryotes
all of these

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Microbiology of Soils
__________ play a key role in the transformation of rock to soil.

Pectin decomposing bacteria
De-nitrifying bacteria
Nitrifying bacteria
Cyanobacteia

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Microbiology of Soils
Bacteria, as a group, are responsible for

nitrogen oxidation
sulfur oxidation
all of these
nitrogen fixation

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

Both (a) and (b)
Anabaena
Clostridium
Nostoc

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Microbiology of Soils
The crops which are involved in nitrogen fixation are

alfalfa and clover
all of these
bean and lupine
soybean

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