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Microbiology of Soils

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

All of these
methanogenic
Transitional
Hydrolytic

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Microbiology of Soils
The microbial ecosystem of soil includes

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

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Microbiology of Soils
Denitrification may be distinguished as

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

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

nitrogen fixation
ammonification
denitrification
nitrification

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

alfalfa and clover
bean and lupine
all of these
soybean

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Microbiology of Soils
Which of the following species of different genera of bacteria are not capable of transforming nitrate to nitrogen?

Agrobacterium
Alcaligenes
Achromobacter
None of these

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