Soil bacteria!!!!
maybe lightning.
The three types of bacteria which are involved in the nitrogen cycle are nitrogen- fixing bacteria which change the nitrogen gas into ammonia. The next is nitrifying bacteria which changes the ammonia into nitrities and then the nitriites into nitrates. Then the plant absorbs the nitrates and uses them to continue growth. Then an animal may eat the plant receiving the nitrogen from it. But it must eventually get ride of it so it produces waste which goes back into the soil and is broken down by decomposers and fungi, which then turn it back into ammonia. The cycle then repeats itself. Extra nitrates are turned back into nitrogen gas by denitrifying bacteria.
Nitrogen Fixation.
denitrification
they turn the nitogen gas into the nitrates and nitrites essential for the soil
The conversion of ammonia to nitrate (nitrification) is performed primarily by soil-living bacteria and other nitrifying bacteria. It is important for the ammonia to be converted to nitrates because accumulated nitrites are toxic to plant life. Denitrification is the reduction of nitrates back into the largely inert nitrogen gas (N2), completing the nitrogen cycle.
The three types of bacteria which are involved in the nitrogen cycle are nitrogen- fixing bacteria which change the nitrogen gas into ammonia. The next is nitrifying bacteria which changes the ammonia into nitrities and then the nitriites into nitrates. Then the plant absorbs the nitrates and uses them to continue growth. Then an animal may eat the plant receiving the nitrogen from it. But it must eventually get ride of it so it produces waste which goes back into the soil and is broken down by decomposers and fungi, which then turn it back into ammonia. The cycle then repeats itself. Extra nitrates are turned back into nitrogen gas by denitrifying bacteria.
Nitrogen Fixation.
denitrification
Nitrogen gas becomes the ultimate product of nitrates and organic matter and complete the nitrogen cycle. Organic matter converts into ammonium, which oxidizes into ammonia and then into nitrites. Nitrites oxidize into nitrates, which reduce into nitrogen gas.
lightning and/or soil in the ground
they turn the nitogen gas into the nitrates and nitrites essential for the soil
Nitrogen gas is released by the action of bacteria.
Nitrates are the negative ions (NO3-) of nitrate salts in solution and Nitrogen is a diatomic elemental gas (N2), 79% in fresh air, insoluble in water.
The conversion of ammonia to nitrate (nitrification) is performed primarily by soil-living bacteria and other nitrifying bacteria. It is important for the ammonia to be converted to nitrates because accumulated nitrites are toxic to plant life. Denitrification is the reduction of nitrates back into the largely inert nitrogen gas (N2), completing the nitrogen cycle.
The conversion of ammonia to nitrate (nitrification) is performed primarily by soil-living bacteria and other nitrifying bacteria. It is important for the ammonia to be converted to nitrates because accumulated nitrites are toxic to plant life. Denitrification is the reduction of nitrates back into the largely inert nitrogen gas (N2), completing the nitrogen cycle.
denitrification
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.