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Microbiology of Soils

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

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

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Microbiology of Soils
The nitrogenase consists of

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

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

Micromonospora
all of these
Streptomyces
Nocardia

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

nitrogenase
nitrate oxidase
none of these
nitrate reductase

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

generally greater than
equal to
generally smaller than
none of these

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

ammonia
nitrate
ATP
glucose

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