(Nick Maclaren) wrote in message ...
In article ,
(sw) writes:
|
| No, because it will be released into the soil, where it will be broken
| down by bacteria. Apparently, some breakdown products disappear very
| slowly from the anaerobic sludge at the bottom of ponds, but garden
| soil has a very different (and much more vigorous) collection of
| microorganisms.
|
| I'd thought there was some research suggesting it doesn't break down in
| soil quite as thoroughly/quickly as was originally believed? Or is that
| more a concern where fields of GM-HT crops are resulting in higher
| usage?

The research I have seen was mainly to do with anaerobic sludge.

I believe that your statement is correct in general, but the
original claim was "completely within days" and the current one
is more like "completely, eventually, but with timescale of some
months". However, I have seen only indirect reports on the latter.


Regards,
Nick Maclaren.

The usual figures you see quoted are a half life of 60 days. This can vary.
with a half life of 60 days six months later 10% or so is still around.

Incidentally the other half truth is that it is destroyed on contact will soil.
It isn't it can get bound up b ut not in all soil types.

--
Neil Jones- http://www.butterflyguy.com/
"At some point I had to stand up and be counted. Who speaks for the
butterflies?" Andrew Lees - The quotation on his memorial at Crymlyn
Bog National Nature Reserve