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MICROBIOLOGY OF SOILS

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

De-nitrifying bacteria
Nitrifying bacteria
Cyanobacteia
Pectin decomposing bacteria

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

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

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Microbiology of Soils
The nitrogenase consists of

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

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

soybean
all of these
alfalfa and clover
bean and lupine

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Microbiology of Soils
Denitrification may be distinguished as

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

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