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Microbiology of Soils

Microbiology of Soils
For rapid decomposition by microbes, the substrate should have a C/N ratio of

30-40
60-80
20-30
10-20

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

generally smaller than
none of these
generally greater than
equal to

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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
Bacteria, as a group, are responsible for

nitrogen fixation
nitrogen oxidation
sulfur oxidation
all of these

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Microbiology of Soils
The diagnostic enzyme for nitrogen-fixing organisms is

none of these
nitrogenase
nitrate reductase
nitrate oxidase

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Microbiology of Soils
Denitrification may be distinguished as

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

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