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Microbiology of Soils

Microbiology of Soils
Which are the main source of biofertilisers?

None of these
Bacillus
Cyanobacteria
Streptococcus

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Microbiology of Soils
The phenomenon of commensalism refers to a relationship between organisms in which

one species of a pair benefits
one species of a pair is more benefited
None of these
both the species of a pair benefit

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Microbiology of Soils
The energy value of biogas is typically

1500 BTU/ft3
1,000 BTU/ft3
400-700 BTU/ft3
more than 5000 BTU/ft3

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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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Microbiology of Soils
The population of algae in soil is __________ that of either bacteria or fungi.

none of these
equal to
generally greater than
generally smaller than

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Microbiology of Soils
Which of the following is capable of oxidizing sulfur to sulfates?

Desulfotomaculum
Rhodomicrobium
Thiobacillus thiooxidans
Rhodospirillum

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