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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

Micromonospora
all of these
Nocardia
Streptomyces

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

Hydrolytic
All of these
methanogenic
Transitional

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Microbiology of Soils
The microbial ecosystem of soil includes

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

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

nitrate
ATP
ammonia
glucose

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Microbiology of Soils
Denitrification is carried out

predominantly by Bacillus spp
usually by facultative anaerobes
All of these
predominantly by Pseudomonas spp

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

bean and lupine
alfalfa and clover
soybean
all of these

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