calling all chemists

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

"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
================================================== ============
You're right, Derek. NO3-N is new to me

Hey gang,

I am not a chemist, but this is an Ag term.

If you would please, could some one forward this to Ingrid, since she has
had me blocked for years now, and we don't speak directly, but the term
NO3-N is a new way designating the relationship of the amounts of nitrogen
applied to fields and the resultant NO3 that remains after the crop has been
harvested. Ag people in numerous states in the heartland have been working
on this for years now, but it is a way of watching and calibrating the the
amounts of N fertilizer needed for the next crop to prevent the buildup of
nitrates and keep them out of the water table amd out of run off.. It is
measured in the 6 inch to one foot levels of the soil all the way to the 3
foot depth of the soil. Nitrates are still measured in ppm, and the N is
measure in pounds/acre. Charts are kept to show the coorelations and show
the amounts needed for a variety of crops.

HTH

Tom L.L.
---------------------------------------------------.
"Killinchy" wrote in message
news:3yyod.313864$%k.20244@pd7tw2no...

"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
================================================== ============
You're right, Derek. NO3-N is new to me

Thanks Tom.

A measurement that combines parts per million with pounds per acre.
Sounds like something an engineer would dream up. It's still not clear
to me how it would relate to the concentration of nitrogen compounds in a
pond.

I'll admit you had me confused when you wrote "this is an Ag term." What
the heck does this have to do with silver (Ag)? Then realized that you
meant AGriculture.

What can I say ... I'm a chemist.

Rich


"Tom L. La Bron" wrote in
:

Hey gang,

I am not a chemist, but this is an Ag term.

If you would please, could some one forward this to Ingrid, since she
has had me blocked for years now, and we don't speak directly, but the
term NO3-N is a new way designating the relationship of the amounts of
nitrogen applied to fields and the resultant NO3 that remains after
the crop has been harvested. Ag people in numerous states in the
heartland have been working on this for years now, but it is a way of
watching and calibrating the the amounts of N fertilizer needed for
the next crop to prevent the buildup of nitrates and keep them out of
the water table amd out of run off.. It is measured in the 6 inch to
one foot levels of the soil all the way to the 3 foot depth of the
soil. Nitrates are still measured in ppm, and the N is measure in
pounds/acre. Charts are kept to show the coorelations and show the
amounts needed for a variety of crops.

HTH

Tom L.L.

"Richard Tanzer" wrote in message
...
Thanks Tom.

A measurement that combines parts per million with pounds per acre.
Sounds like something an engineer would dream up. It's still not clear
to me how it would relate to the concentration of nitrogen compounds in a
pond.

I'll admit you had me confused when you wrote "this is an Ag term." What
the heck does this have to do with silver (Ag)? Then realized that you
meant AGriculture.

What can I say ... I'm a chemist.
snip

What can I say...I was tryin' to figure out how Texas A&M factored into
this.

BV.

Sorry Richard,

About the Ag designation, living in the midwest all my life (except when for
the 23 years in the Navy) Ag is just ingrained as being Agriculture.

From what I seen the NO3-N designation is like a title for the coorelation
of the Nitrates to the Nitrogen. It is the NO3-N tables for the individual
crops and the soils that they grow in is what is important. I am not a
farmer either, it is just a thread of conversation that I run into all the
time.

Tom L.L.
-----------------------------------------------
"Richard Tanzer" wrote in message
...
Thanks Tom.

A measurement that combines parts per million with pounds per acre.
Sounds like something an engineer would dream up. It's still not clear
to me how it would relate to the concentration of nitrogen compounds in a
pond.

I'll admit you had me confused when you wrote "this is an Ag term." What
the heck does this have to do with silver (Ag)? Then realized that you
meant AGriculture.

What can I say ... I'm a chemist.

Rich


"Tom L. La Bron" wrote in
:

Hey gang,

I am not a chemist, but this is an Ag term.

If you would please, could some one forward this to Ingrid, since she
has had me blocked for years now, and we don't speak directly, but the
term NO3-N is a new way designating the relationship of the amounts of
nitrogen applied to fields and the resultant NO3 that remains after
the crop has been harvested. Ag people in numerous states in the
heartland have been working on this for years now, but it is a way of
watching and calibrating the the amounts of N fertilizer needed for
the next crop to prevent the buildup of nitrates and keep them out of
the water table amd out of run off.. It is measured in the 6 inch to
one foot levels of the soil all the way to the 3 foot depth of the
soil. Nitrates are still measured in ppm, and the N is measure in
pounds/acre. Charts are kept to show the coorelations and show the
amounts needed for a variety of crops.

HTH

Tom L.L.

I'm a chemist. I agree with most of the comments in this thread.

Nitrogen, as found in the air is Nsub2. The "sub" indicates subscript.
Nsub2 has little biological activity, but certain bacteria and other
organisms can "fix" nitrogen from the air and incorporate it into
biochemicals.

Ammonia is NHsub3. When ammonia is dissolved in water it is sometimes
called ammonium hydroxide or NHsub4OH. Ammonium hydroxide is a weak base.
It partially breaks down, or disassociates into the ammonium ion NHsub4sup+
and hydroxyl ions OHsup-. The "sup" indicates superscript. In addition to
other toxicity problems associated with ammonia, it is basic and will raise
the pH, i.e. increase the alkalinity of the water.

Nitrous acid is HNOsub2. Nitrous acid is a strong acid, in water it
completely breaks down into Hsub3Osup+ (hydronium ions) plus NOsub2sup+
(nitrite ion). The nitrite ion oxidizes quickly in well-oxygenated water
to become NOsub3sup+ (nitrate).

Unfortunately, none of this explains "what exactly is the difference
between NO3-N and just plain NO3." The terminology is simply not clear.

Richard

P.S. - I don't have a husband, but I do have an excellent wife.



Derek Broughton wrote in
:

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.