Does anyone have an easy way to remember the nitrogen cycle?

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I really cant remember what the bacteria do or where they go on the diagrams or any of the other information for that matter :L

Posted Wed 6th June, 2012 @ 16:23 by Beth

13 Answers

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i find it hard to remember this one too! i use this myself 'ANNfD' to state the order of stages if that helps and then i guess you could try and add in the bacteria into this...?

sorry if this is no good but... it may help :)

Answered Wed 6th June, 2012 @ 16:29 by Becky
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I find it easier to remember what each bacteria does in a sequence:

Decomposers: Decompose proteins and urea and turn them into AMMONIA

Nitrifying Bacteria: turn AMMONIA in decaying matter into NITRATES

Denitrifying Bacteria: Turn NITRATES into N2 GAS

Nitrogen-fixing Bacteria: Turn atmospheris N2 GAS into NiTROGEN COMPOUNDS that plants can use.

Hope it helped! :)

Answered Mon 11th June, 2012 @ 15:30 by Caroline
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I'm doing the same exam - triple science?

Answered Mon 11th June, 2012 @ 18:51 by ReinsOfKhaos
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just seen that you are doing GCSEs, that right? in that case then you probably wont need the stuff i just said... :D sorry :L

Answered Wed 6th June, 2012 @ 16:31 by Becky
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its fine, thanks anyway :)

Answered Wed 6th June, 2012 @ 16:41 by Beth
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haha no problem! :)

Answered Wed 6th June, 2012 @ 16:47 by Becky
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Just remember all the kay facts:

Bacteria involved: Nitrogen Fixing; Nitrifying; Denitrifying; Putrefying and Saprophytes.

Answered Fri 8th June, 2012 @ 21:36 by ReinsOfKhaos
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  • Nitrogen Fixing: N2 is turned into nitrates. Is found on the roots of leguminous plants such as peas or clover. Example is Rhizobium.
  • Nitrifying: Ammonia turned to nitrites [by Nitrosomonas] and nitrites are turned into nitrates [by nitrobacter].
  • Denitrifying: Nitrites --> N2. Nitrates --> N2.
  • Putrefying: decaying matter --> ammonia
  • Saprophytes: decay/decompose decaying matter
Answered Fri 8th June, 2012 @ 21:40 by ReinsOfKhaos
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Not entirely sur eon how to remember it.

  • Denitrifying is simple enough, everything is undone back into N2.
  • Putrefying [just sounds NAAASTY, so everything ends in ammonia, which tbf is a nasty chemical]
  • Nitrifying: ammonia --> nitrites --> nitrates............i'm not really sure how to help youu remember that........
  • Nitrogen-fixing: N2--> nitrates [N2 is 'fixed']
Answered Fri 8th June, 2012 @ 21:43 by ReinsOfKhaos
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Thank you, i drawed a couple of picture with the bacteria and things on. im ok with it now, good job really as the exams tomorrow :)

Answered Mon 11th June, 2012 @ 17:27 by Beth
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One good way to remember the diagram of the nitrogen cycle is too, look at the diagram for lets say 10 seconds move to a different part of the room and draw on another blank piece of paper what you remember, this way you are memorising the diagram and will therefore remember what it is!

Hope this helps, email back if it does, it did for me :) x 

Answered Mon 11th June, 2012 @ 19:55 by Jade Longman
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yeh drawing it again helped, thank you :) and yeh triple award.

Answered Wed 13th June, 2012 @ 12:56 by Beth
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I'm doing that triple exam this year on Tuesday (I realise that I might just be A FEW years out here!!) Hope your exam went well. I'm struggling with the nitrogen cycle too and wondered how you got through your exam, or if anyone knows a simple mnemonic or rhyme to remember it. I just dropped 6 marks on this on a past paper - that's the difference between grades and I'm quite stressed as I'm hoping - fingers crossed (and toes!!) for an A, but I would be very upset if I achieved lower than a B. Please Help !!!!

Answered Sat 9th May, 2015 @ 15:55 by Kirsten3