Re: [compost_tea] low phosphate?
Oh Great, so we can't actually know Total P? I guess to do it we would have
to
grind the sample to the finest molecules and test that...
Maybe burn it with a laser till its all gas, and analyse that...
(is this practical?)
Lynton (who is even more amazed at how much he has to learn!)
----- Original Message -----
From: <soilfoodweb_at_aol.com>
To: <compost_tea_at_yahoogroups.com>
Sent: Saturday, September 18, 2004 12:08 PM
Subject: Re: [compost_tea] low phosphate?
> the "total P" on the last phosphate e-mail isn't the TOTAL P - it's just
the
> exchangeable, most likely. You have to know, and say, what test was used
to
> determine the values. There are probably 150 different extraction methods
for
> assessing "total P" in soil, and none of them truly give you total P. The
150
> tests give soluble, or exchanageable P, not truly total P.
>
> Elaine R. Ingham
> Soil Foodweb Inc., Corvallis, Oregon
> Soil Foodweb Inc., Port Jefferson, New York
> Soil Foodweb Institute, Lismore Australia
> Soil Foodweb Institute Cambridge, New Zealand
> Soil Foodweb Inc., Hilversum, The Netherlands
> Laboratorios de Soil Foodweb, Culiacan, Mexico
> Soil Foodweb Inc., Jerome, Idaho
>
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Received on Sat Sep 18 2004 - 01:02:14 EDT
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: Tue Feb 07 2012 - 14:15:29 EST