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Microbiology of Soils

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

nitrate
ammonia
ATP
glucose

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Microbiology of Soils
The physical structure of soil is improved by the accumulation of

minerals
all of these
water
mold mycelium

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

soybean
all of these
bean and lupine
alfalfa and clover

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Microbiology of Soils
Denitrification is carried out

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

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

equal to
none of these
generally greater than
generally smaller than

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Microbiology of Soils
The nitrogenase consists of

both (a) and (b)
dinitrogenase reductase
none of these
dinitrogenase

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