Re: Question on PPM (Parts Per Million)

Please note Mark's formula has to use onces  (oz) of fertilizer and  gallons
of water in order for the formula to work. The 75 in the formula is used for
converting onces (oz) into gallons. This is a good and fairly accurate
formula.

Gary

----- Original Message ----- 
From: "Mark K." <korney19@adelphia.net>
To: <pumpkins@hort.net>
Sent: Wednesday, February 11, 2004 4:32 PM
Subject: RE: Question on PPM (Parts Per Million)


> Bob & all, you may have to reverse engineer this or apply it to the math
> Vince gave, dividing up an acres into sq ft.
>
>
> PPM EXPLANATION:
>
> Often in designing fertilization programs, the term ppm appears. Simply,
> this means Parts Per
> Million. One ppm of a certain nutrient, such as nitrogen, means that the
> solution contains
> 1 part of nitrogen in 1,000,000 parts of water by weight. There is an easy
> formula which can
> be used to determine the ppm of a solution.
>
>   oz of fertilizer product
> ----------------------------  x grade of fertilizer x 75 = ppm
> gallons of water in solution
>
>
> It works like this: 20-20-20 contains 20% N. To find the ppm of nitrogen
in
> a
> solution containing 1 oz of 20-20-20 in 100 gallons of water, the equation
> is:
>
>    1 (oz of product)
> ----------------------  x 20 (grade of fertilizer) x 75 = 15 ppm
> 100 (gallons of water)
>
>
> One ounce of 20-20-20 in 100 gallons of water has 15 parts per million of
> nitrogen in
> the solution.
>
> To determine the number of ounces required to make up a 200 ppm solution
of
> nitrogen with 20-20-20 fertilizer in 100 gallons of solution, simply
divide
> 200 by 15.
> Your answer is 13 1/3 ounces.
>
> As always, do the division first, then the multiplication. I had to use
> dashed lines for the "divided by" part, hope it shows up
> clearly/understandably.
>
> Mark
>
>
>
> -----Original Message-----
> From: owner-pumpkins@hort.net [o*@hort.net] On Behalf
Of
> Bob Attaway
> Sent: Wednesday, February 11, 2004 12:26 PM
> To: pumpkins@hort.net
> Subject: Re: Question on PPM (Parts Per Million)
>
>
> Mark:
>
> I would appreciate having your fertilizer conversion formula
> for PPM and I sure others would also.
>
> Thanks:
> Bob A.
>
> ----- Original Message ----- 
> From: "Mark K." <korney19@adelphia.net>
> To: <pumpkins@hort.net>
> Sent: Tuesday, February 10, 2004 7:29 PM
> Subject: RE: Question on PPM (Parts Per Million)
>
>
> > I'm lucky to have square feet, let alone acres. I have a formula to
> convert
> > fertilizer ratings to ppm but that's all. Let me know if it would help.
> >
> > Mark
> >
> > -----Original Message-----
> > From: owner-pumpkins@hort.net [o*@hort.net] On Behalf
> Of
> > Bob Attaway
> > Sent: Tuesday, February 10, 2004 6:05 PM
> > To: Mallorn
> > Subject: Question on PPM (Parts Per Million)
> >
> >
> > At our recent South Eastern Growers meeting I was told that  an acre is
> > considered to be 2 million pounds of soil.
> >
> > I am working on determining PPM, but the Soil test by my local
> > University states everything in pounds of amendment per acre.
> > If what I understand is true, I would just divide pounds of amendment
per
> > acre
> > by 2 to obtain PPM.
> >
> > Is this true?
> >
> > I am  terrible at math.
> >
> > Thanks in advance:
> > Bob Attaway
> >
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