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Microbiology of Soils

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

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

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

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

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Microbiology of Soils
The nonsymbiotic bacteria which fix nitrogen live in the soil independently are

All of these
Azotobacter
Clostridium
considerably less important in comparison to the symbiotic bacteria

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Microbiology of Soils
The phenomenon of commensalism refers to a relationship between organisms in which

both the species of a pair benefit
one species of a pair is more benefited
one species of a pair benefits
None of these

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

minerals
water
all of these
mold mycelium

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Microbiology of Soils
The microbial ecosystem of soil includes

None of these
biotic and abiotic components of soil
abiotic components of soil
biotic components of soil

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