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NItrogen cycle (N2 in atmosphere (Nitrogen fixation by non living…
NItrogen cycle
N2
in atmosphere
Nitrogen fixation
by non living processes
(Lightning, Haber Process)
NH3
N2
in atmosphere
Nitrogen fixation
by living organisms
Mutualistic nitrogen-fixing bacteria
in root nodules (Rhizobium)
NH3
Free living nitrogen fixing bacteria
in soil (Azotobacter)
NH3
NH3
Nitrification
by nitrifiying bacteria
(Nitrosomonas)
Nitrites
NO2-
Nitrification
by nitrifying bacteria
(Nitrobacter)
Nitrates
NO3-
Denitrification
by
Pseudomonas denitrificans
N2 in atmosphere
Uptake and assimilation by plant
Plant protein
Animal protein
Ammonification
by decomposers
(bacteria and fungi)
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Ammonification
by decomposers
(bacteria and fungi)
NH3