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Microbiology of Soils

Microbiology of Soils
Denitrification may be distinguished as

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

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Microbiology of Soils
The physical structure of soil is improved by the accumulation of

minerals
all of these
water
mold mycelium

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Microbiology of Soils
The transformation of nitrates to gaseous nitrogen is accomplished by microorganisms in a series of biochemical reactions. The process is known as

nitrification
ammonification
nitrogen fixation
denitrification

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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
The diagnostic enzyme for denitrification is

nitrate reductase
nitro oxidoreductase
nitrate oxidase
none of these

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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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