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Microbiology of Soils

Microbiology of Soils
Denitrification may be distinguished as

dissimilative
assimilative
blue baby syndrome
both (a) and (b)

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Microbiology of Soils
The nonsymbiotic bacteria which fix nitrogen live in the soil independently are

Clostridium
considerably less important in comparison to the symbiotic bacteria
Azotobacter
All of these

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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
nitrogen fixation
nitrification

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Microbiology of Soils
Degree of compost maturity can be assesed by

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

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Microbiology of Soils
Which of the following species of different genera of bacteria are not capable of transforming nitrate to nitrogen?

Agrobacterium
Alcaligenes
None of these
Achromobacter

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

Thiobacillus thiooxidans
Rhodospirillum
Rhodomicrobium
Desulfotomaculum

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