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Microbiology of Soils

Microbiology of Soils
Denitrification may be distinguished as

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

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

nitrogen oxidation
all of these
sulfur oxidation
nitrogen fixation

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Microbiology of Soils
The energy value of biogas is typically

400-700 BTU/ft3
more than 5000 BTU/ft3
1,000 BTU/ft3
1500 BTU/ft3

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Microbiology of Soils
In the process of nitrogen fixation, which of the following microorganism is involved?

Symbiotic microorganisms only
None of these
Non symbiotic microorganisms only
Non symbiotic and symbiotic microorganisms only

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Microbiology of Soils
The population of algae in soil is __________ that of either bacteria or fungi.

none of these
generally smaller than
generally greater than
equal to

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Microbiology of Soils
Which of the following soil microorganism is involved in the reduction of sulfates to H2S?

Rhodospirillum
Thiobacillus thiooxidans
Desulfotomaculum
Rhodomicrobium

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