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Microbiology of Soils

Microbiology of Soils
Which are the main source of biofertilisers?

Streptococcus
Bacillus
None of these
Cyanobacteria

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Microbiology of Soils
The phenomenon of commensalism refers to a relationship between organisms in which

None of these
one species of a pair is more benefited
both the species of a pair benefit
one species of a pair benefits

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Microbiology of Soils
Which of the following fungi on infecting crop roots can improve their uptake of phosphorus and other nutrients?

VA Mycorrhiza
Saccharomyces cerevisiae
Candida torulopsis
Aspergillus niger

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Microbiology of Soils
Denitrification may be distinguished as

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

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

Nitrifying bacteria
Pectin decomposing bacteria
Cyanobacteia
De-nitrifying bacteria

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

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

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