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Microbiology of Soils

Microbiology of Soils
Denitrification may be distinguished as

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

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Microbiology of Soils
Which of the following is capable of oxidizing sulfur to sulfates?

Rhodospirillum
Rhodomicrobium
Thiobacillus thiooxidans
Desulfotomaculum

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Microbiology of Soils
Denitrification is carried out

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

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

sulfur oxidation
all of these
nitrogen oxidation
nitrogen fixation

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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
The nonsymbiotic bacteria which fix nitrogen live in the soil independently are

considerably less important in comparison to the symbiotic bacteria
All of these
Clostridium
Azotobacter

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