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Microbiology of Soils

Microbiology of Soils
The crops which are involved in nitrogen fixation are

soybean
bean and lupine
alfalfa and clover
all of these

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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
methanogenic
All of these
Hydrolytic

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

denitrification
nitrogen fixation
all of these
nitrification

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

nitrate
ATP
ammonia
glucose

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Microbiology of Soils
Most soil protozoa are flagellates or amoebas, having their dominant mode of nitrogen as

ingestion of mold
ingestion of bacteria
ingestion of fungi
all of these

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Microbiology of Soils
Denitrification is carried out

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

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