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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