"Derek Broughton" wrote in message
...
wrote:

a chemist on this list? I done all the searches and have come up with
the
standard "total nitrogen" thing, now I want it explained in more detail
and WHY they use this way of expressing it when they werent doing that
20
years ago when I took the damn

Who's "they"? When I've seen NO3-N, I thought it was just an indicator of
the Nitrate - Nitrogen pathway, not a molecular notation.
--
derek
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You're right, Derek. NO3-N is new to me