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Microbiology of Soils

Microbiology of Soils
An example of a symbiotic nitrogen fixer is

Clostridium
Azotobacter
Beijerinckia
Rhizobium

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Microbiology of Soils
Denitrification is carried out

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

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Microbiology of Soils
The microbial ecosystem of soil includes

None of these
biotic components of soil
abiotic components of soil
biotic and abiotic components of soil

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

Clostridium
Nostoc
Both (a) and (b)
Anabaena

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

Rhodomicrobium
Rhodospirillum
Thiobacillus thiooxidans
Desulfotomaculum

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Microbiology of Soils
The energy value of biogas is typically

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

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