Your answer is invalid, because the plants return the nitrogen back in to the air. I think what you're trying to ask is what forms of nitrogen is taken by the plants. The answer is nitrides, and nitrates. Nitrides are formed by decomposers in the soil and further nitrogen fixation causes nitrides into nitrates. You can notice this through their equation: nitrides (n3) nitrates (no3).
The nitrogen goes into the nodules of the plant.
Nitrogen in the atmosphere exists in the form of diatomic molecules, specifically as N2.
atmosphere
In the atmosphere nitrogen takes the form of the diatomic nitrogen molecule, N2.
Nitrogen is put back into the earth through the process of nitrogen fixation, where nitrogen gas in the atmosphere is converted into a usable form for plants by certain bacteria. This fixed nitrogen is then taken up by plants through their roots and incorporated into their tissues. When plants die and decompose, the nitrogen is returned to the soil in organic form, where it can be reused by other plants.
When organisms die, their bodies decompose bringing the nitrogen into soil on land or into ocean water. Bacteria alter the nitrogen into a form that plants are able to use. Other types of bacteria are able to change nitrogen dissolved in waterways into a form that allows it to return to the atmosphere.
The nitrogen goes into the nodules of the plant.
The form of nitrogen that is beneficial for the atmosphere is nitrogen gas (N2).
Nitrogen in the atmosphere exists in the form of diatomic molecules, specifically as N2.
Nitrogen gas in the atmosphere is converted by nitrogen-fixing bacteria into a form that plants can absorb, such as ammonium or nitrate. Plants take up these nitrogen compounds from the soil through their roots and incorporate them into proteins. When animals eat plants, they obtain nitrogen from plant proteins, continuing the cycle.
The transfer of nitrogen from the atmosphere to plants and back occurs through a process called nitrogen fixation. This can happen through the action of nitrogen-fixing bacteria that convert nitrogen gas into a form that plants can use. Once plants assimilate this nitrogen, it can be returned to the atmosphere through processes like denitrification or can be transferred to other organisms through the food chain.
The reason nitrogen is abundant in the atmosphere yet limits plant growth is that plants cannot make use of elemental nitrogen. The bond between the nitrogen atoms in elemental nitrogen (which is a diatomic gas) is very strong and not easily broken. Therefore, plants must rely on bacteria in order to fix the nitrogen (convert it into a usable form).
The process in which nitrogen returns to it's gas form is known as nitrogen fixation
In the nitrogen cycle, bacteria fix nitrogen from the atmosphere to form ammonia. This ammonia can then be converted into nitrites and nitrates by other bacteria in the soil, which plants can absorb to use for growth. Nitrogen eventually returns to the atmosphere through denitrification by bacteria.
atmosphere
Nitrogen is found in the atmosphere as diatomic elemental nitrogen, N2.
In the atmosphere nitrogen takes the form of the diatomic nitrogen molecule, N2.