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Microbiology of Soils

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

alfalfa and clover
all of these
soybean
bean and lupine

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

ammonia
ATP
glucose
nitrate

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Microbiology of Soils
The breakdown of cattle manure in biogas is accomplished by which of the following type of bacteria?

Transitional
All of these
methanogenic
Hydrolytic

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Microbiology of Soils
Denitrification may be distinguished as

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

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Microbiology of Soils
Which of the following is capable of oxidizing sulfur to sulfates?

Rhodospirillum
Rhodomicrobium
Desulfotomaculum
Thiobacillus thiooxidans

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Microbiology of Soils
The phenomenon of commensalism refers to a relationship between organisms in which

one species of a pair benefits
both the species of a pair benefit
one species of a pair is more benefited
None of these

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