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Microbiology of Soils

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

Nostoc
Anabaena
Clostridium
Both (a) and (b)

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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

fast growth
medium growth
slow growth
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 mold
ingestion of bacteria

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Microbiology of Soils
Which are the main source of biofertilisers?

Bacillus
Cyanobacteria
None of these
Streptococcus

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Microbiology of Soils
The crops which are involved in nitrogen fixation are

soybean
bean and lupine
alfalfa and clover
all of these

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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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