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MICROBIOLOGY OF SOILS

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

Pectin decomposing bacteria
Cyanobacteia
Nitrifying bacteria
De-nitrifying bacteria

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

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

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Microbiology of Soils
The nitrogenase consists of

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

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

bean and lupine
soybean
alfalfa and clover
all of these

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Microbiology of Soils
Denitrification may be distinguished as

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

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