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Microbiology of Soils

Microbiology of Soils
Degree of compost maturity can be assesed by

both (a) and (b)
germination test
infrared technique
None of these

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

ammonification
nitrogen fixation
denitrification
nitrification

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Microbiology of Soils
Denitrification is carried out

predominantly by Pseudomonas spp
All of these
usually by facultative anaerobes
predominantly by Bacillus spp

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

all of these
nitrogen fixation
denitrification
nitrification

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

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

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Microbiology of Soils
The transformation of nitrates to gaseous nitrogen is accomplished by microorganisms in a series of biochemical reactions. The process is known as

ammonification
nitrogen fixation
denitrification
nitrification

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