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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
Hydrolytic
methanogenic
Transitional

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Microbiology of Soils
The energy value of biogas is typically

1500 BTU/ft3
400-700 BTU/ft3
1,000 BTU/ft3
more than 5000 BTU/ft3

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

denitrification
nitrification
nitrogen fixation
ammonification

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Microbiology of Soils
__________ play a key role in the transformation of rock to soil.

De-nitrifying bacteria
Nitrifying bacteria
Pectin decomposing bacteria
Cyanobacteia

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Microbiology of Soils
The microbial ecosystem of soil includes

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

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

Thiobacillus thiooxidans
Desulfotomaculum
Rhodospirillum
Rhodomicrobium

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