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Microbiology of Soils

Microbiology of Soils
For rapid decomposition by microbes, the substrate should have a C/N ratio of

60-80
10-20
20-30
30-40

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Microbiology of Soils
Which are the main source of biofertilisers?

Bacillus
Streptococcus
Cyanobacteria
None of these

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

Thiobacillus thiooxidans
Rhodospirillum
Desulfotomaculum
Rhodomicrobium

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

nitrogen fixation
sulfur oxidation
nitrogen oxidation
all of these

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Microbiology of Soils
Which of the following is not the biofertilisers producing bacteria?

Both (a) and (b)
Clostridium
Nostoc
Anabaena

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