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Microbiology of Soils

Microbiology of Soils
The conversion of molecular nitrogen into ammonia is known as

denitrification
nitrogen fixation
nitrification
ammonification

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

alfalfa and clover
soybean
all of these
bean and lupine

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Microbiology of Soils
Denitrification may be distinguished as

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

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Microbiology of Soils
Which of the following microorganism use H2S as the electron donor to reduce carbon dioxide?

Rhodomicrobium
Chlorobium
Chromaticum
Both (a) and (b)

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Microbiology of Soils
The diagnostic enzyme for denitrification is

none of these
nitrate reductase
nitrate oxidase
nitro oxidoreductase

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Microbiology of Soils
The microbial ecosystem of soil includes

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

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