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Microbiology of Soils

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

ammonification
nitrogen fixation
denitrification
nitrification

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Microbiology of Soils
Nitrogen fixation refers to the direct conversion of atmospheric nitrogen gas into

glucose
ammonia
ATP
nitrate

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Microbiology of Soils
For rapid decomposition by microbes, the substrate should have a C/N ratio of

20-30
30-40
60-80
10-20

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Microbiology of Soils
The phenomenon of commensalism refers to a relationship between organisms in which

None of these
one species of a pair is more benefited
both the species of a pair benefit
one species of a pair benefits

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Microbiology of Soils
In the process of nitrogen fixation, which of the following microorganism is involved?

Symbiotic microorganisms only
Non symbiotic microorganisms only
None of these
Non symbiotic and symbiotic microorganisms only

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Microbiology of Soils
The energy value of biogas is typically

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

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