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Microbiology of Soils

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

Clostridium
Both (a) and (b)
Anabaena
Nostoc

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Microbiology of Soils
__________ play a key role in the transformation of rock to soil.

Nitrifying bacteria
De-nitrifying bacteria
Pectin decomposing bacteria
Cyanobacteia

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Microbiology of Soils
Nitrogen fixation refers to the direct conversion of atmospheric nitrogen gas into

glucose
nitrate
ATP
ammonia

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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
Denitrification is carried out

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

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Microbiology of Soils
Bacteria, as a group, are responsible for

nitrogen oxidation
sulfur oxidation
nitrogen fixation
all of these

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