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Microbiology of Soils

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

nitrification
ammonification
denitrification
nitrogen fixation

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Microbiology of Soils
The energy value of biogas is typically

more than 5000 BTU/ft3
1500 BTU/ft3
1,000 BTU/ft3
400-700 BTU/ft3

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

all of these
alfalfa and clover
bean and lupine
soybean

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Microbiology of Soils
An example of a symbiotic nitrogen fixer is

Clostridium
Azotobacter
Beijerinckia
Rhizobium

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Microbiology of Soils
Bacteria, as a group, are responsible for

nitrogen fixation
sulfur oxidation
all of these
nitrogen oxidation

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Microbiology of Soils
Denitrification may be distinguished as

assimilative
blue baby syndrome
dissimilative
both (a) and (b)

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