cclose
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Okay ive never understood this topic and it keeps coming up on papers so could someone please explain it for me?

In particular this question from June 2003:
-refering to the procress where Nitrate iones are turned into Nitrogen Gas**, describe and explain the conditions under which it occurs. (3)

Thanks for any help in advance!! greatly appreciated!!!
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yassir
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Its a small topic so doesnt rely need much understanding. Denitrification is the opposite of nitrification so it turns useful plant proteins in the soil (nitrates) into nitrogen gas in the atmosphere which plants cannot use.
1) Denitrification is anaerobic so requires conditions with little or no oxygen such as waterlogged soil.
2) It is aided by bacteria which work in these anaerobic conditions such as thiobacillus and pseudomonas.
3) If oxygen is present, then denitrification fails and nitrification takes over.

hope that helps.
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Joe555
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Read the stuff above the question, it usually gives away some of the answers! Where did you get june 03 if you don't mind me asking? Could you provide a link?
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Matchbox123
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was that at AS ? i dont even remember nitrification..haha ergh.
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yassir
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http://www.edexcelbiology.co.uk/home/ theyve got most papers since 2002!
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cclose
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(Original post by Joe555)
Read the stuff above the question, it usually gives away some of the answers! Where did you get june 03 if you don't mind me asking? Could you provide a link?
I was given it by a friend and is attached for you

For future papers... go into the link Yassir posted- i use that one a lot


And thanks Yassir for ur help!
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