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Microbiology of Soils

Microbiology of Soils
An example of a symbiotic nitrogen fixer is

Azotobacter
Clostridium
Beijerinckia
Rhizobium

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Microbiology of Soils
Denitrification may be distinguished as

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

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

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

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Microbiology of Soils
The microbial ecosystem of soil includes

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

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Microbiology of Soils
The groups of bacteria which have the ability to fix nitrogen from air to soil are

both (a) and (b)
symbiotic
none of these
nonsymbiotic

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

nitrification
all of these
denitrification
nitrogen fixation

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