"excess nitrogen" is a correct and usable phrase in written English.
It can be used to refer to large amounts of nitrogen in a particular environment that can be detrimental to the balance of a particular ecosystem. For example, "The runoff from the factory contained large amounts of excess nitrogen, which caused a spike in algae growth in the nearby lake."
They were not sufficiently interested in human betterment or the fatal consequences of excess nitrogen dioxide emissions.
This enables the excess nitrogen to be released harmlessly through the lungs without forming bubbles.
We were concerned about how farmers returned manure nutrients to their fields, and how we could prevent runoff of excess nitrogen and phosphorus into watersheds".
Saltwater bodies like Barnegat Bay are adversely affected by excess nitrogen, freshwater areas by too much phosphorus.
The drunkenness is thought to arise when excess nitrogen in the bloodstream and organs prompts nerve impulses to slow.
But seaweed's most compelling property may be its ability to scrub, absorbing excess nitrogen and phosphorous, deposited in the water by agricultural runoff and wastewater, and dissolved carbon dioxide from combusted fossil fuels.
This meant making a 'safety stop' during our return to the surface, a pause between three metres and six metres, to allow our bodies to rid themselves of the excess nitrogen they'd absorbed.
In saturation diving, a person is exposed to pressure for a period long enough, or at a depth great enough, so that the person's system begins to absorb excess nitrogen from the gas he or she breathes.
According to figures from the Connecticut Fund for the Environment, "nonpoint source pollution" from a combination of engine combustion, septic systems and overfertilization of lawns and crops contributes an estimated 8,500 tons of excess nitrogen yearly to the Sound.
Any excess nitrogen nourishes whatever crop grows in the field next.
The excess nitrogen allows algae populations to explode.
