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Microbiology of Soils

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

Nocardia
all of these
Micromonospora
Streptomyces

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Microbiology of Soils
Degree of compost maturity can be assesed by

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

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Microbiology of Soils
The groups of bacteria which have the ability to fix nitrogen from air to soil are

symbiotic
none of these
nonsymbiotic
both (a) and (b)

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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
Symbiotic microorganisms only
Non symbiotic microorganisms only

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

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

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Microbiology of Soils
An example of a symbiotic nitrogen fixer is

Clostridium
Rhizobium
Azotobacter
Beijerinckia

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