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Microbiology of Soils

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

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

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Microbiology of Soils
The nitrogenase consists of

dinitrogenase reductase
none of these
dinitrogenase
both (a) and (b)

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

nitrification
ammonification
nitrogen fixation
denitrification

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Microbiology of Soils
Denitrification is carried out

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

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Microbiology of Soils
Which of the following fungi on infecting crop roots can improve their uptake of phosphorus and other nutrients?

Aspergillus niger
Saccharomyces cerevisiae
Candida torulopsis
VA Mycorrhiza

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Microbiology of Soils
Denitrification may be distinguished as

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

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