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Microbiology of Soils

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

Both (a) and (b)
Clostridium
Anabaena
Nostoc

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

Transitional
All of these
methanogenic
Hydrolytic

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Microbiology of Soils
Some microorganisms have the ability to increase the nitrogen content of soils, are called as

nitrification
denitrification
nitrogen fixation
all of these

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

ammonia
glucose
ATP
nitrate

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

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

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Microbiology of Soils
Which of the following fungi on infecting crop roots can improve their uptake of phosphorus and other nutrients?

Aspergillus niger
VA Mycorrhiza
Saccharomyces cerevisiae
Candida torulopsis

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