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Microbiology of Soils

Microbiology of Soils
The organisms responsible for the characteristic musty or earth odor of a freshly plowed field is/are

Nocardia
Micromonospora
all of these
Streptomyces

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

ATP
nitrate
ammonia
glucose

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

Anabaena
Clostridium
Both (a) and (b)
Nostoc

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Microbiology of Soils
Assimilative denitrification is done by

fungi
prokaryotes
all of these
plants

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

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

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Microbiology of Soils
The energy value of biogas is typically

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

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