Talk:Nitrogen fixation

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Nitrogen can also be artificially fixed for use in fertilizer, explosives, or in other products. The most popular method is by the Haber process. This artificial fertilizer production has achieved such scale that it is now the largest source of fixed nitrogen in the Earth's ecosystem.

I can't find a source for this claim, and it seems doubtful. Jfbolus (talk) 02:01, 14 April 2009 (UTC)

I know for a fact that this is the case - I will try and find a citation - it should be pretty easy. Smartse (talk) 12:09, 16 April 2009 (UTC)
Done. Thanks for pointing that out. Smartse (talk) 12:26, 16 April 2009 (UTC)

Proposed merger of Nitrate fixation[edit]

It seems pretty obvious that the Nitrate fixation page-let is actually about N2 ie. nitrogen and not about 'NO3 fixation.' I suggest the 'Nitrate fixation' page be deleted. Satyrium 15:11, 5 September 2006 (UTC)

This article would be much more useful to non-biologists if the list of nitrogen-fixing plants included the common names of those plants.

Stewart king (talk) 21:50, 8 February 2008 (UTC)

This article would be more useful if it mention what is the goal of doing nitrogen fixation... —Preceding unsigned comment added by (talk) 09:05, 27 February 2008 (UTC)

There is a lot of unnecessarily complicated language in this article, aside from linked terminology or special jargon. It could be greatly simplified. —Preceding unsigned comment added by Smurfsahoy (talkcontribs) 22:05, 25 February 2009 (UTC)

Nitrogen fixing Archaebacteria[edit]

From what I could see, references 2 and 3 in the Wiki article do not speak about nitrogen fixation in Archaea. N2 fixation by mesophilic Archaea is until now only speculation. It is known, however, that some thermophilic archaeon can fix atmospheric N2 reference 1 and reference 2 and reference 3 and reference 4. The mechanism of N2 fixation was found to be essentially similar to what is found in bacteria reference 5 reference 6

—Preceding unsigned comment added by Riennn (talkcontribs) 12:43, 27 January 2009 (UTC)


N fixation by combustion is mentioned in the introduction but not in the article. Smartse (talk) 12:20, 16 April 2009 (UTC)


I've read elsewhere that a few Rubus species can do this too, e.g., Rubus ellipticus. Horatio (talk) 09:04, 12 September 2009 (UTC)

Definition issue[edit]

First sentence: "Nitrogen fixation is a process, biological, abiotic, or synthetic by which nitrogen (N2) in the atmosphere is converted into ammonia (NH3)." Later in the lead: "Nitrogen fixation also refers to other biological conversions of nitrogen, such as its conversion to nitrogen dioxide."

But this would exclude things like lightning creating NO2 (that's not a "biological" conversion), which IS called 'nitrogen fixation'. Really the term seems to be applied for anything that converts atmospheric N2 to nitrogen compounds (I've seen it applied to NOx production in general), though the specific biological def. is probably the more common context.

I think the first sentence should read: "Nitrogen fixation is a process, biological, abiotic, or synthetic, by which nitrogen (N2) in the atmosphere is converted into nitrogen compounds such as ammonia (NH3)." This would make the "also refers to" unnecessary while still mentioning ammonia. Vultur (talk) 22:40, 30 March 2012 (UTC)

I concur weith the above, and add another thing[edit]

By saying N2 fixation is only a term used for ammonia, and then saying that "Lightning does it too", it's understood that lightning creates ammonia. At least, I understood it, for the past year.

The source "3", next to lightning, uses nitrogen fixation as a term to talk about N going to NO3, so there, it should be changed I think.

I don't know the protocol for changing text, maybe someone with time... puts a draft here?

Orangutan45 (talk) 21:38, 15 October 2016 (UTC)

BNF vandalised?[edit]

About a month ago a guest user changed the BNF reaction to read N2 + 3 O2 → 2 NO3 ... That isn't how you make ammonia so I have reverted it with a note of possible vandalism.

My limited knowledge of chemistry says that reaction wouldn't work anyway, at least not without some missing components being added. A lot of energy or a catalyst, plus charge notation on the radical output? That's beside the point though.

Nazzy (talk) 16:11, 5 November 2014 (UTC)

Assessment comment[edit]

The comment(s) below were originally left at Talk:Nitrogen fixation/Comments, and are posted here for posterity. Following several discussions in past years, these subpages are now deprecated. The comments may be irrelevant or outdated; if so, please feel free to remove this section.

Cleanup rough content structure, especially in biological nitrogen fixation section. Discussion of history of understanding, first fixation on geologic timescale. Quantify contribution to nitrogen cycle, energy requirement for chemical fixation, energy source for biological fixation. -- Paleorthid 05:03, 6 December 2006 (UTC)

Last edited at 19:21, 21 November 2007 (UTC). Substituted at 01:20, 30 April 2016 (UTC)