nitrogen fixation. look it up
Rhizobium
nitrites
Through lightning strikes or manure
The nitrogen cycle is the process by which nitrogen is converted between its various chemical forms. This transformation can be carried out via both biological and non-biological processes.Nitogen fixing bacteria takes nitrogen from the air and make it available to plants.The plants take up the nitrogen and are eaten by animals.Animals use nitrogen to make proteins.Animals die and decompose, the nitrogen goes back into the soil.Denitrifiying bacteria put the nitrogen back into the atmosphere.
they put carbon dioxide back in the atmosphere
Yes,Plants in closed ecosystems can survive by using the carbon dioxide in the water and making oxygen with it. However, organisms are needed to put carbon dioxide back into the water, so that the plant can oxygenate it again.
it depends on which living organisms you are talking about. Plants absorb it through their roots in the form of nitrate (NO3) or ammonia (NH4) or in the case of Nitrogen-fixing plants, they host a bacterial infection which undergoes di-nitrogen fixation within a nodule and makes the nitrogen for the plant. Many types of bacteria and other microorganisms possess the ability to fix atmospheric N2, which eukaryotes in general cannot do. Animals in general get their nitrogen by consuming other organisms or organic material.
People put nitrogen in fertilizers because nitrogen in the form of ammonium nitrogen is essential for a plant's growth.
A number of things humans can do return nitrogen to the soil. but I'm betting the most common one is mowing their lawns. The decomposing grass clippings will put some nitrogen back into the soil.
Soybean is a cash crop and is also used in crop rotation to put nitrogen back into the soil.
no put your in bridge
What organic molecules is nitrogen found in