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Microbiology of Soils

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

alfalfa and clover
all of these
bean and lupine
soybean

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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
all of these
ingestion of mold

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Microbiology of Soils
__________ play a key role in the transformation of rock to soil.

Nitrifying bacteria
Cyanobacteia
Pectin decomposing bacteria
De-nitrifying bacteria

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Microbiology of Soils
The diagnostic enzyme for denitrification is

none of these
nitrate reductase
nitro oxidoreductase
nitrate oxidase

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

all of these
nitrification
nitrogen fixation
denitrification

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Microbiology of Soils
The microbial ecosystem of soil includes

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

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