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Microbiology of Soils

Microbiology of Soils
For rapid decomposition by microbes, the substrate should have a C/N ratio of

10-20
20-30
60-80
30-40

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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 groups of bacteria which have the ability to fix nitrogen from air to soil are

symbiotic
none of these
nonsymbiotic
both (a) and (b)

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

all of these
nitrogen fixation
nitrogen oxidation
sulfur oxidation

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

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

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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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