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Microbiology of Soils

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

water
all of these
mold mycelium
minerals

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Microbiology of Soils
Which of the following microorganism use H2S as the electron donor to reduce carbon dioxide?

Chlorobium
Chromaticum
Rhodomicrobium
Both (a) and (b)

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

methanogenic
Hydrolytic
Transitional
All of these

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Microbiology of Soils
The energy value of biogas is typically

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

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

Cyanobacteia
De-nitrifying bacteria
Nitrifying bacteria
Pectin decomposing bacteria

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Microbiology of Soils
The population of algae in soil is __________ that of either bacteria or fungi.

equal to
generally greater than
generally smaller than
none of these

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