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Microbiology of Soils

Microbiology of Soils
Degree of compost maturity can be assesed by

both (a) and (b)
None of these
infrared technique
germination test

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

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

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Microbiology of Soils
Nitrifying bacteria can not be isolated directly by the usual techniques employed to isolate hetrotrophic bacteria. The reasons may be due to

slow growth
medium growth
none of these
fast growth

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Microbiology of Soils
The breakdown of cattle manure in biogas is accomplished by which of the following type of bacteria?

Hydrolytic
All of these
Transitional
methanogenic

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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
denitrification
nitrogen fixation
nitrification

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

Rhodomicrobium
Rhodospirillum
Thiobacillus thiooxidans
Desulfotomaculum

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