Nitrogen CycleBy Nathan McClurg and Joey

Andrada

Key Terms

• Denitrification– removal of nitrogen or

nitrogen compounds – Conversion of nitrogen

to gaseous form

Precipitation

• Process of rain, sleet, snow, hail, etc.

Ammonium

• Form of nitrogen contained in fertilizer

• generated in soil by breakdown of organic matter

• NH4

Mineralization• Organic compounds to

inorganic compounds•(Organic) Dead plant, animal material

•(Inorganic) nitrates, carbon dioxide

Nitrates

• Found in plant nutrient and fertilizer

• Animal feed, manures, and sewage

Nitrites• NO2• Converted from free

ammonia

• Harmful at any level• Converts into nitrates

Amount of Nitrogen

• 78.08% in atmosphere• 79% bound nitrogen in lithosphere• Mass of nitrogen 20,000,000,000,000 tons

in hydrosphere• 80% in biosphere

Ecological Impact• About 90% of the soil• Denitrification decreases fertility of

plants• High concentrates of nitrates are toxic• Without Denitrification life would not be

possible except near large bodies of water

Biological Impact• Health effects of

nitrogen• Environmental

effects of nitrogen

Bibliography• http://www.aquariacentral.com/articles/glossary.shtml• http://pnwmg.org/mgglossarya.html• www.hubbardbrook.org/6-12_education/Glossary/

Glossary.htm• www.laurentianvalleytwsp.on.ca/

DomesticWaterWellDefine.html• www.aquariacentral.com/articles/glossary.shtml• www.biologie.uni-hamburg.de/b-online/e54/54d.htm• http://www.lenntech.com/elements-and-water/nitrogen-

and-water.htm

Hyperlinks to Images• http://www.gettyimages.com/Creative/Frontdoor/NationalGeographicRM?esource=googUSA_Ima

ges_Categories&country=USA&kw=usa+nature_picture• http://images.google.com/imgres?imgurl=http://www.windows.ucar.edu/earth/climate/images/

nitrogencycle.jpg&imgrefurl=http://www.ucar.edu/news/backgrounders/nitrogen.shtml&h=718&w=720&sz=186&hl=en&start=7&um=1&usg=__aDebNgM_WXcI0zJSF0Z7mXAz-iw=&tbnid=SoJ4GhLez3nuPM:&tbnh=140&tbnw=140&prev=/images%3Fq%3DNitrogen%2BCycle%26um%3D1%26hl%3Den%26rls%3Dcom.microsoft:en-US%26sa%3DG

• http://filebox.vt.edu/users/chagedor/biol_4684/Cycles/Denit.html• http://science.howstuffworks.com/acid-rain.htm• http://jedidiah.stuff.gen.nz/wp/?p=15• http://www.esc.ethz.ch/research/efficientconversion/cotwo/co2projects• http://www.advancedaquarist.com/2007/8/tips• http://eliastobias.net/?cat=1• http://www.desktopscenes.com/Autumn%20Scenes%20from%20Southern%20Vermont

%20(2003)/slides/Rocky%20Forest%20Path.html• http://www.citivestmortgage.com/linkstoResources.html