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Microbiology of Soils

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

all of these
alfalfa and clover
bean and lupine
soybean

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

nitrate
ATP
ammonia
glucose

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

all of these
nitrogen oxidation
nitrogen fixation
sulfur oxidation

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Microbiology of Soils
Assimilative denitrification is done by

all of these
prokaryotes
fungi
plants

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

Thiobacillus thiooxidans
Rhodomicrobium
Rhodospirillum
Desulfotomaculum

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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

nitrogen fixation
ammonification
nitrification
denitrification

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