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Microbiology of Soils

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

nitrification
ammonification
denitrification
nitrogen fixation

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Microbiology of Soils
The energy value of biogas is typically

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

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

Both (a) and (b)
Nostoc
Anabaena
Clostridium

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

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

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Microbiology of Soils
The microbial ecosystem of soil includes

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

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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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