Exercise: Microbiology Of Soils

Questions for: Microbiology Of Soils

Which are the main source of biofertilisers?
A:
Cyanobacteria
B:
Bacillus
C:
Streptococcus
D:
None of these
Answer: A
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For rapid decomposition by microbes, the substrate should have a C/N ratio of
A:
10-20
B:
20-30
C:
30-40
D:
60-80
Answer: C
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Some microorganisms have the ability to increase the nitrogen content of soils, are called as
A:
nitrogen fixation
B:
denitrification
C:
nitrification
D:
all of these
Answer: A
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Which of the following species of different genera of bacteria are not capable of transforming nitrate to nitrogen?
A:
Achromobacter
B:
Agrobacterium
C:
Alcaligenes
D:
None of these
Answer: D
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The breakdown of cattle manure in biogas is accomplished by which of the following type of bacteria?
A:
Hydrolytic
B:
Transitional
C:
methanogenic
D:
All of these
Answer: D
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