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Nitrogen cycle

en.wikipedia.org/wiki/Nitrogen_cycle

The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into various chemical forms as it circulates among the atmosphere and terrestrial and marine ecosystems. The conversion ...

The Nitrogen Cycle - Boundless

www.boundless.com/microbiology/textbooks/boundless-microbiology-textbook/microbial-ecology-16/nutrient-cycles-195/the-nitrogen-cycle-984-5464/

The nitrogen cycle is the process by which nitrogen is converted from ... Nitrogen is converted from atmospheric nitrogen (N2) into usable forms, such as ... to use atmospheric nitrogen (N2), it must be "fixed" or converted into ammonia (NH3). ... This is important because plants can assimilate nitrate into their tissues, and ...

Nitrogen cycle - Lenntech

www.lenntech.com/nitrogen-cycle.htm

Nitrogen in the gaseous form cannot be absorbed and used as a nutrient by plants and ... Plants can use ammonia as a nitrogen source. ... anaerobic bacteria will convert them back into nitrogen gas, during a process called denitrification.

Nitrogen Fixation - Tree of Life Web Project

tolweb.org/notes/?note_id=3920

The process of biological nitrogen fixation was discovered by the Dutch ... Plants cannot fix nitrogen on their own, but need it in one form or another to make ... The fixation of nitrogen, in which the gaseous form dinitrogen, N2) is converted into forms ... it to an inorganic form (usually ammonium, NH4<sup>+</sup>) that plants can use.

Forms of Nitrogen in the Soil - Plant and Soil Sciences eLibrary

passel.unl.edu/pages/informationmodule.php?idinformationmodule=1130447042&topicorder=2&maxto=8

Plants normally use nitrogen in only the ammonium and nitrate forms. ... it through the processes of fixation, mineralization, nitrification, leaching, plant assimilation, ... Bacteria can convert nitrogen to organic forms through fixation. .... or more is adequate to move urea far enough into the soil to minimize volatilization loss.

The Nitrogen Cycle - Kimball's Biology Pages

www.biology-pages.info/N/NitrogenCycle.html

But most organisms cannot use nitrogen in this form. Plants must secure ... Three processes are responsible for most of the nitrogen fixation in the biosphere: atmospheric ... Ammonia can be taken up directly by plants — usually through their roots. However, most of the ammonia produced by decay is converted into nitrates.

efu-nitrogen - CropNutrition.com

www.cropnutrition.com/efu-nitrogen

Soil nitrogen exists in three general forms: organic nitrogen compounds, ammonium ... This nitrogen is not directly available to plants, but some can be converted to ... grouped into a system called the nitrogen cycle, which can be presented in ... The quantity of inorganic nitrogen available for crop use often depends on the ...

Nitrogen - Soil Management - University of Hawaii

www.ctahr.hawaii.edu/mauisoil/c_nutrients01.aspx

Denitrification: Conversion of nitrate to atmospheric forms of nitrogen ... Ammonium can escape from the surface of the soil under certain conditions and is harmful ... Organic nitrogen must be converted to ammonium before it is used by plants. ... is necessary to convert N2 gas into ammonium through this biological process.

Nitrogen Cycle - Environmental Decision Making, Science, and ...

environ.andrew.cmu.edu/m3/s4/cycleNitro.shtml

Seventy-nine percent of the atmosphere is nitrogen in the form of N2 gas. ... This process of conversion is called nitrogen fixation, and makes the nitrogen ... Plants can not use N2, and the N2 can therefore escape into the atmosphere. Farmers ...

Visionlearning | Earth Science | The Nitrogen Cycle

www.visionlearning.com/en/library/Earth-Science/6/The-Nitrogen-Cycle/98

Nitrogen fixation is the process wherein N2 is converted to ammonium, or NH4<sup>+</sup>. ... Once in the form of ammonium, nitrogen is available for use by plants or for further ... Eventually, this atmospheric nitrogen can be blown into nitrogen- sensitive ...

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The nitrogen cycle | Sciencelearn Hub

sciencelearn.org.nz

Jul 30, 2013 ... As a gas, however, nitrogen can't be used by most living things. ... It has to be converted or 'fixed' to a more usable form through a process called fixation. ... this nitrogen to ammonium ions (NH4<sup>+</sup>), which can be used by plants. ... Nitrifying bacteria in the soil convert ammonia into nitrite (NO2<sup>-</sup>) and t...

What is the process of converting nitrogen into a form that plants can ...

www.answers.com

The process is called nitrogen fixation. ... The process of converting nitrogen into a form plants can use is known as nitrogen? Nitrogen Fixation -Eugene Chung.

nitrogen

www.cas.miamioh.edu

These organisms convert nitrogen in the soil to ammonia, which can then be taken up by ... After nitrogen has been fixed, other bacteria convert it into nitrate, in a process ... Plants cannot use the nitrogen in our atmosphere without the assistance of ... Plant roots assimilate Nitrogen mainly in the form of nitrates while animals ...