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Microbiology of Soils

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

glucose
ammonia
nitrate
ATP

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

generally greater than
generally smaller than
none of these
equal to

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Microbiology of Soils
Which are the main source of biofertilisers?

Cyanobacteria
Bacillus
Streptococcus
None of these

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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
Candida torulopsis
Saccharomyces cerevisiae
VA Mycorrhiza

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

Hydrolytic
Transitional
All of these
methanogenic

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Microbiology of Soils
The conversion of molecular nitrogen into ammonia is known as

nitrification
denitrification
ammonification
nitrogen fixation

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