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Microbiology of Soils

Microbiology of Soils
The organisms responsible for the characteristic musty or earth odor of a freshly plowed field is/are

Nocardia
Streptomyces
all of these
Micromonospora

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Microbiology of Soils
The nitrogenase consists of

dinitrogenase
both (a) and (b)
dinitrogenase reductase
none of these

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Microbiology of Soils
The microbial ecosystem of soil includes

biotic and abiotic components of soil
None of these
abiotic components of soil
biotic components of soil

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

ATP
glucose
ammonia
nitrate

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

soybean
alfalfa and clover
all of these
bean and lupine

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

Anabaena
Nostoc
Both (a) and (b)
Clostridium

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