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Microbiology of Soils

Microbiology of Soils
Denitrification may be distinguished as

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

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Microbiology of Soils
The nonsymbiotic bacteria which fix nitrogen live in the soil independently are

Clostridium
All of these
considerably less important in comparison to the symbiotic bacteria
Azotobacter

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Microbiology of Soils
Most soil protozoa are flagellates or amoebas, having their dominant mode of nitrogen as

ingestion of mold
ingestion of bacteria
all of these
ingestion of fungi

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

Chromaticum
Chlorobium
Both (a) and (b)
Rhodomicrobium

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Microbiology of Soils
Bacteria, as a group, are responsible for

nitrogen fixation
all of these
nitrogen oxidation
sulfur oxidation

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Microbiology of Soils
Some microorganisms have the ability to increase the nitrogen content of soils, are called as

nitrification
denitrification
all of these
nitrogen fixation

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