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Microbiology of Soils

Microbiology of Soils
Which of the following is not the biofertilisers producing bacteria?

Anabaena
Nostoc
Clostridium
Both (a) and (b)

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

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

nitrogen fixation
nitrification
denitrification
ammonification

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

nitrate
glucose
ammonia
ATP

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Microbiology of Soils
The energy value of biogas is typically

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

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

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

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