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Microbiology of Soils

Microbiology of Soils
Degree of compost maturity can be assesed by

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

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Microbiology of Soils
The microbial ecosystem of soil includes

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

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Microbiology of Soils
The diagnostic enzyme for nitrogen-fixing organisms is

nitrate reductase
none of these
nitrate oxidase
nitrogenase

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

Rhodomicrobium
Chlorobium
Chromaticum
Both (a) and (b)

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Microbiology of Soils
The physical structure of soil is improved by the accumulation of

water
minerals
all of these
mold mycelium

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Microbiology of Soils
Denitrification is carried out

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

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