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Microbiology of Soils

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

all of these
nitrogen fixation
nitrogen oxidation
sulfur oxidation

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

equal to
none of these
generally smaller than
generally greater than

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Microbiology of Soils
The energy value of biogas is typically

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

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Microbiology of Soils
Nitrifying bacteria can not be isolated directly by the usual techniques employed to isolate hetrotrophic bacteria. The reasons may be due to

none of these
fast growth
medium growth
slow growth

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Microbiology of Soils
Which of the following statement is not true about composition of biogas?

Both (a) and (b)
It is composed almost exclusively of methane and carbon dioxide
It also contains with traces of H2S, N2, H2and CO
It also contains with traces of O2 and Cl2

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Microbiology of Soils
Assimilative denitrification is done by

all of these
plants
fungi
prokaryotes

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