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Microbiology of Soils

Microbiology of Soils
Assimilative denitrification is done by

plants
all of these
fungi
prokaryotes

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

Pectin decomposing bacteria
Nitrifying bacteria
Cyanobacteia
De-nitrifying bacteria

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

sulfur oxidation
all of these
nitrogen fixation
nitrogen oxidation

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Microbiology of Soils
Which of the following is capable of oxidizing sulfur to sulfates?

Rhodospirillum
Thiobacillus thiooxidans
Rhodomicrobium
Desulfotomaculum

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

bean and lupine
alfalfa and clover
all of these
soybean

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

nitrogen fixation
nitrification
denitrification
all of these

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