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Microbiology of Soils

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

bean and lupine
alfalfa and clover
soybean
all of these

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Microbiology of Soils
Assimilative denitrification is done by

fungi
plants
prokaryotes
all of these

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Microbiology of Soils
The nitrogenase consists of

dinitrogenase
dinitrogenase reductase
none of these
both (a) and (b)

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Microbiology of Soils
The conversion of molecular nitrogen into ammonia is known as

denitrification
nitrification
nitrogen fixation
ammonification

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Microbiology of Soils
Denitrification is carried out

All of these
usually by facultative anaerobes
predominantly by Pseudomonas spp
predominantly by Bacillus spp

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Microbiology of Soils
An example of a symbiotic nitrogen fixer is

Azotobacter
Clostridium
Rhizobium
Beijerinckia

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