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Nitrogen cycle
The nitrogen cycle is a natural process in which atmospheric nitrogen enters the soil and becomes part of living organisms. It is essential to living things and plays an important role in ecosystems. The steps of the nitrogen cycle are nitrogen fixation, nitrogen assimilation, ammonification, nitrification, and denitrification. Human activities like cultivation, harvesting, and fossil fuel use can disrupt the nitrogen cycle and cause over-supply of nitrogen in the environment, leading to issues like soil acidification and increased greenhouse gases.
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Introduction to the nitrogen cycle, its importance in ecosystems and living organisms, and its role in plant nutrition.
Overview of key steps: Nitrogen Fixation, Assimilation, Ammonification, Nitrification, and Denitrification.
Details on nitrogen fixation, including bacteria involvement, the Haber-Bosch process, and lightning effects.
Explanation of nitrogen assimilation into plant tissue and its transfer to animals.
The process where decomposing microorganisms yield ammonia from organic remains and waste.
Transformation of ammonia into nitrates by nitrifying bacteria for plant use.
Metabolism of nitrates back to atmospheric nitrogen by denitrifying bacteria.
Effects of human activities like agriculture and fossil fuel use on soil nitrogen balance.
Environmental effects like acidification, greenhouse gases, and pollution in water bodies.
List of references used for compiling information on the nitrogen cycle.
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Nitrogen cycle
- 1. NITROGEN CYCLE CRUZ,Jan Rasto Ruelan, Rose 2AR-4
- 2. Nitro an essentialpart of the amino acids. It is a basic element of life. Cycle gen n + es ‘‘ nitre forming’’ composes about four-fifths (78.03 percent) by volume of the atmosphere. in the form of protein is an important constituent of animal tissue. is an important element in plant nutrition. is inert and serves as a diluent for oxygen in burning and respiration processes.
- 3. Nitrogen Cycle naturalcyclic process in the course of which atmospheric nitrogen enters the soil and becomes part of living organisms
- 4. Importance of NitrogenCycle essential to living organisms and its availability plays a crucial role in the organization and functioning of the world's ecosystems key factor controlling the nature and diversity of plant life vital ecological processes such as plant productivity and the cycling of carbon and soil minerals
- 5. Steps of NitrogenCycle Nitrogen Fixation Nitrogen Assimilation Ammonification Nitrification Denitrification
- 6. Nitrogen Fixation nitrogen gasis converted into inorganic nitrogen compounds. It is mostly (90 percent) accomplished by free-living, nitrogen-fixing bacteria.
- 7. Nitrogen-Fixing Bacteria symbioticbacteria living on the roots of plants (mostly legumes and alders) cyanobacteria (formerly known as blue-green algae) archaebacteria (also known as archaea) in deep-sea hydrothermal vents
- 8. Nitrogen Fixation byHaber-Bosch Process method of directly synthesizing ammonia from hydrogen and nitrogen , developed by the German physical chemist Fritz Haber.
- 9. Nitrogen Fixation byLightning The high energies provided by lightning and cosmic radiation serve to combine atmospheric nitrogen and oxygen into nitrates, which are carried to the Earth’s surface in precipitation.
- 10. Steps of NitrogenCycle Nitrogen Fixation Nitrogen Assimilation Ammonification Nitrification Denitrification
- 11. Nitrogen Assimilation areassimilation of nitrates and ammonia resulting from nitrogen fixation into the specific tissue compounds of algae and higher plants. Animals then ingest these algae and plants, converting them into their own body compounds.
- 12. Steps of NitrogenCycle Nitrogen Fixation Nitrogen Assimilation Ammonification Nitrification Denitrification
- 13. Ammonification The remainsof all living things—and their waste products—are decomposed by microorganisms which yields ammonia.
- 14. Steps of NitrogenCycle Nitrogen Fixation Nitrogen Assimilation Ammonification Nitrification Denitrification
- 15. Nitrification a processcarried out by nitrifying bacteria, transforms soil ammonia into nitrates, which plants can incorporate into their own tissues.
- 16. Steps of NitrogenCycle Nitrogen Fixation Nitrogen Assimilation Ammonification Nitrification Denitrification
- 17. Denitrification The processwhere nitrates are metabolized by denitrifying bacteria to free nitrogen and returned to the atmosphere
- 18. Human Intrusion andIts Effects Declination of nitrogen in the soil cultivation of croplands harvesting of crops cutting of forests
- 19. Human Intrusion andIts Effects Over supply of Nitrogen the production and use of nitrogen fertilizers burning of fossil fuels in automobiles, power generation plants, and industries
- 20. Human Intrusion andIts Effects Over supply of Nitrogen the leaching of nitrogen from over fertilized croplands, animal wastes and sewage
- 21. Effects of OverSupply of Nitrogen substantial acidification of soils and of the waters of streams and lakes acid rain Increased global concentrations of nitrous oxide (N2O), a potent greenhouse gas,
- 22. Effects of OverSupply of Nitrogen stratospheric ozone depletion greatly increased transport of nitrogen by rivers into estuaries and coastal waters where it is a major pollutant.
- 23. References http://www.bbc.co.uk/schools/gcsebitesize/science/21c/food/naturalpolymersrev3.shtml http://www.epa.gov/owow/watershed/wacademy/acad2000/nitroabstr.htmlMicrosoft ® Encarta ® 2009. © 1993-2008 Microsoft Corporation. All rights reserved. nitrogen cycle . (2010). In Encyclopædia Britannica . Retrieved September 02, 2010, from Encyclopædia Britannica Online: http://www.britannica.com/EBchecked/topic/416271/nitrogen-cycle Haber-Bosch process. (2010). Encyclopædia Britannica. Encyclopaedia Britannica Ultimate Reference Suite. Chicago: Encyclopædia Britannica.