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Microbiology of Soils

Microbiology of Soils
Assimilative denitrification is done by

fungi
all of these
prokaryotes
plants

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Microbiology of Soils
The breakdown of cattle manure in biogas is accomplished by which of the following type of bacteria?

Transitional
All of these
methanogenic
Hydrolytic

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Microbiology of Soils
Denitrification is carried out

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

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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

nitrification
ammonification
nitrogen fixation
denitrification

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

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

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Microbiology of Soils
Degree of compost maturity can be assesed by

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

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