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Microbiology of Soils

Microbiology of Soils
Degree of compost maturity can be assesed by

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

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

nitrate reductase
nitrogenase
none of these
nitrate oxidase

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

nitrification
nitrogen fixation
ammonification
denitrification

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Microbiology of Soils
Nitrifying bacteria can not be isolated directly by the usual techniques employed to isolate hetrotrophic bacteria. The reasons may be due to

medium growth
slow growth
none of these
fast growth

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Microbiology of Soils
The organisms responsible for the characteristic musty or earth odor of a freshly plowed field is/are

Micromonospora
all of these
Streptomyces
Nocardia

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Microbiology of Soils
Which of the following statement is not true about composition of biogas?

It is composed almost exclusively of methane and carbon dioxide
It also contains with traces of O2 and Cl2
Both (a) and (b)
It also contains with traces of H2S, N2, H2and CO

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