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Microbiology of Soils

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

ammonification
nitrification
denitrification
nitrogen fixation

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

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

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Microbiology of Soils
The microbial ecosystem of soil includes

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

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Microbiology of Soils
Some microorganisms have the ability to increase the nitrogen content of soils, are called as

denitrification
nitrogen fixation
nitrification
all of these

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Microbiology of Soils
Denitrification may be distinguished as

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

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

Both (a) and (b)
Rhodomicrobium
Chlorobium
Chromaticum

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