RE: Pounds to PPM Conversion, plus the K/Ca Excess & Deficiencies Post (too much K?)


I found a formula and a whole page on ppm but it's inside a 188 page pdf
Acrobat document; will try to break it out on its own but here's the
formula I have with an example, don't know where the square feet or soil
depth fit in though:

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: Plantex 20-20-20 contains 20% N. To find the ppm of
nitrogen in a
solution containing 1 oz of Plantex 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 Plantex 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 Plantex 20-20-20 fertilizer in 100 gallons of solution,
simply divide 200 by 15.
The answer is 13 1/3 ounces.

(for this example, not yours)


Hope this helps?

Below is the table showing having too much of one leading to not enough
of another. This might relate to the hi-potassium (K) post about too
much not being good


ANTAGONISMS: Having insufficient quantities of a nutrient in the soil
can create
deficiencies in the soil; however, having excesses of certain nutrients
can also induce deficiencies of others as the chart below indicates.
High root media levels of nutrients in the left column bring about
deficiencies of the
nutrients listed in the right column.

(This will probably show up aligned best in "true" e-mail programs, not
web-based html like hotmail or yahoo unless you can change your font to
fixed width, I'll try to format it in CourierNew font)

 Common Antagonisms Occurring in General
-----------------------------------------
Nutrient in Excess *** Induced Deficiency
------------------ *** ------------------
     N             ***       K
     K             ***       N, Ca, Mg
     Na            ***       K, Ca, Mg
     Ca            ***       Mg
     Mg            ***       Ca
     Ca            ***       B
     Fe            ***       Mn
     Mn            ***       Fe


Hope this helps?

Mark



-----Original Message-----
From: owner-pumpkins@hort.net [ <o*@hort.net>
o*@hort.net] On Behalf Of vince
Sent: Tuesday, April 15, 2003 6:57 PM
To: pumpkins@mallorn.com
Subject: Pounds to PPM Conversion


Ok, here is a question for a real garden wizard.  How many pounds of
20/0/0 fertilizer does it take to raise the nitrogen level 10 ppm in a
100 square foot patch.  Assume a tilling depth of 6"

Any takers??

vince
The New Yahoo! Search - Faster. Easier. Bingo  <http://search.yahoo.com>
http://search.yahoo.com

---------------------------------------------------------------------
Pumpkin-growing archives:  <http://www.hort.net/lists/pumpkins/>
http://www.hort.net/lists/pumpkins/
To sign-off this list, send email to majordomo@hort.net with the message
text UNSUBSCRIBE PUMPKINS

---------------------------------------------------------------------
Pumpkin-growing archives: http://www.hort.net/lists/pumpkins/
To sign-off this list, send email to majordomo@hort.net with the
message text UNSUBSCRIBE PUMPKINS



Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index