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Conversion of inert elemental nitrogen gas into biologically usable form is called nitrogen fixation. Organism that performs nitrogen fixation is Rhizobium Leguminous.
Conversion of inert elemental nitrogen gas into biologically usable form is called nitrogen fixation. Organism that performs nitrogen fixation is Rhizobium Leguminous.
Nitrogen fixation is carried out by nitrogen fixing bacteria in the nodules of the roots of legumes, and in the soil.
Organisms tend to get phosphorus from their local ecosystem. An organism can also get nitrogen from its local ecosystem. Nitrogen is added to the organism's local ecosystem by bacteria from the air.
Bacteria is the the most responsible organism that converts nitrogen into nitrates. Which plants can then use.
Nitrogen fixation carried out by the microbes is known as biological nitrogen fixation.many microbes can fix nitrogen non-symbiotically like cyanobacteria,anabaena,etc whereas certain fix N2 symbiotically like rhizhobium species.
Conversion of Nitrogen gas into Nitrates\Ammonia.-When Lightning strikes the nitrogen in air get converted into Nitrogen Oxides and then is brought down by rain in from of Soluble Nitrates.These Nitrates are the soluble form of nitrogen for plants. Though lightning play a minor role in nitrogen fixation.-Nitrogen is also fixed by Microorganisms which are free-living or the organisms that live in the plants (Symbiotic relations).These Organisms convert the nitrogen in soluble nitrates.-Nitrogenous Fertilizers are also one from of Soluble nitrogen.*** These Nitrates and ammonia fertilizers are then consumed by plants and the plants are consumed by us.Hence Nitrogen is in the Biotic Part of the Ecosystem.
Nitrification can occur in drinking water. In water distribution systems where chloramines are used as the secondary disinfectant, the presence of free ammonia can sometimes act as a substrate for ammonia-oxidizing microorganisms. The subsequent reactions can lead to the depletion of the disinfectant residual in the system.
Bacteria
Chemoautotrophs like Nitrogen fixing bacteria
Nitrogen fixation is the process by which nitrogen is taken from its relatively inert molecular form (N2) in the atmosphere and converted into nitrogen compounds useful for other chemical processes (such as, notably, ammonia, nitrate and nitrogen dioxide).
nitrification= it is the conversion of ammonia first into nitrites then into nitrates by nitrifying bacteria. dentrification=it is the conversion of nitrites and nitrates into free nitrogen.