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Microbiology of Soils

Microbiology of Soils
Assimilative denitrification is done by

fungi
prokaryotes
plants
all of these

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Microbiology of Soils
In the process of nitrogen fixation, which of the following microorganism is involved?

None of these
Non symbiotic and symbiotic microorganisms only
Symbiotic microorganisms only
Non symbiotic microorganisms only

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Microbiology of Soils
Which are the main source of biofertilisers?

Cyanobacteria
None of these
Bacillus
Streptococcus

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Microbiology of Soils
Which of the following species of different genera of bacteria are not capable of transforming nitrate to nitrogen?

Achromobacter
None of these
Alcaligenes
Agrobacterium

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Microbiology of Soils
The physical structure of soil is improved by the accumulation of

all of these
mold mycelium
minerals
water

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Microbiology of Soils
The microbial ecosystem of soil includes

abiotic components of soil
biotic and abiotic components of soil
None of these
biotic components of soil

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