Microbiology of Soils
Denitrification is carried out

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

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Microbiology of Soils
Denitrification is

changing of atmospheric nitrogen (N2) to nitrogen compounds
reduction of nitrate (NO3-) to nitrogen gas
reduction of nitrate to organic nitrogen compounds
both (a) and (b)

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Microbiology of Soils
The groups of symbiotic bacteria, which have the ability to fix nitrogen

derive their food and minerals from the legume, and in turn they supply the legume with some or all of its nitrogen
these bacteria are from the genus, Rhizobium
grow together for a mutual benefit is called symbiosis and so these bacteria are called symbiotic nitrogen-fixing bacteria
All of these

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