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Microbiology of Soils

Microbiology of Soils
Denitrification may be distinguished as

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

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

Chlorobium
Chromaticum
Both (a) and (b)
Rhodomicrobium

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

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

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Microbiology of Soils
Assimilative denitrification is done by

fungi
plants
prokaryotes
all of these

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

Anabaena
Both (a) and (b)
Clostridium
Nostoc

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Microbiology of Soils
Nitrifying bacteria can not be isolated directly by the usual techniques employed to isolate hetrotrophic bacteria. The reasons may be due to

none of these
slow growth
fast growth
medium growth

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