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Microbiology of Soils

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

Nostoc
Anabaena
Clostridium
Both (a) and (b)

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Microbiology of Soils
Degree of compost maturity can be assesed by

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

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Microbiology of Soils
The breakdown of cattle manure in biogas is accomplished by which of the following type of bacteria?

methanogenic
Transitional
Hydrolytic
All of these

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

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

Thiobacillus thiooxidans
Desulfotomaculum
Rhodospirillum
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

nitrogen fixation
ammonification
denitrification
nitrification

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