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Microbiology of Soils

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

soybean
alfalfa and clover
all of these
bean and lupine

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Microbiology of Soils
The energy value of biogas is typically

400-700 BTU/ft3
1500 BTU/ft3
more than 5000 BTU/ft3
1,000 BTU/ft3

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Microbiology of Soils
Which of the following microorganism use H2S as the electron donor to reduce carbon dioxide?

Rhodomicrobium
Both (a) and (b)
Chromaticum
Chlorobium

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

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

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Microbiology of Soils
Assimilative denitrification is done by

fungi
all of these
plants
prokaryotes

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

Rhodospirillum
Rhodomicrobium
Thiobacillus thiooxidans
Desulfotomaculum

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