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Microbiology of Soils

Microbiology of Soils
Which of the following is not the biofertilisers producing bacteria?

Both (a) and (b)
Anabaena
Nostoc
Clostridium

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Microbiology of Soils
Which are the main source of biofertilisers?

None of these
Bacillus
Cyanobacteria
Streptococcus

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Microbiology of Soils
Which of the following soil microorganism is involved in the reduction of sulfates to H2S?

Rhodospirillum
Thiobacillus thiooxidans
Desulfotomaculum
Rhodomicrobium

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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

ammonification
denitrification
nitrification
nitrogen fixation

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

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Microbiology of Soils
In the process of nitrogen fixation, which of the following microorganism is involved?

Non symbiotic and symbiotic microorganisms only
Symbiotic microorganisms only
Non symbiotic microorganisms only
None of these

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