Re: [compost_tea] low phosphate?

From: L Blair <rlbct_at_clear.net.nz>
Date: Sat, 18 Sep 2004 16:26:39 +1200
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
>


Yahoo! Groups Sponsor
ADVERTISEMENT
click here


Yahoo! Groups Links

Received on Sat Sep 18 2004 - 01:02:14 EDT

This archive was generated by hypermail 2.3.0 : Tue Feb 07 2012 - 14:15:29 EST