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    im confused about the nitrogen cycle.
    do plants take up ammonium ions or nitrate ions? and at what stage does this occur?
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    Are you doing GCSE or A level or what?
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    (Original post by Terriel)
    Are you doing GCSE or A level or what?
    alevel aqa
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    Ah, me too! I'll just dig out my notes:
    Plants take up nitrate ions from the soil. Nitrate ions are oxidised nitrite ions, which in turn are oxidised ammonium ions - plants do not take up ammonium ions.
    Do ask if you want any more help, it'll force me to do some revision too.
    Edit: this doesn't really occur in any particular stage (i.e. ammonification, nitrification, nitrogen fixation, denitrification) because the plants simply absorb the nitrate ions and use them in molecules, they don't change the molecule, so when they die and decompose/ are eaten/ whatever it is nitrate ions that are transferred around the food web
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    (Original post by Terriel)
    Ah, me too! I'll just dig out my notes:
    Plants take up nitrate ions from the soil. Nitrate ions are oxidised nitrite ions, which in turn are oxidised ammonium ions - plants do not take up ammonium ions.
    Do ask if you want any more help, it'll force me to do some revision too.
    Edit: this doesn't really occur in any particular stage (i.e. ammonification, nitrification, nitrogen fixation, denitrification) because the plants simply absorb the nitrate ions and use them in molecules, they don't change the molecule, so when they die and decompose/ are eaten/ whatever it is nitrate ions that are transferred around the food web

    but my CGP revision guide says they take up ammonium ions and my textbook says nitrate ions, that is why i am confused.
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    This might help
    https://youtu.be/oiiKHxY_5ys

    Ammonium ions will be converted to nitrates by bacteria, then absorbed by plants.
 
 
 
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