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permaculture - Re: [permaculture] Re: permaculture digest, Vol 1 #392 - 5 msgs

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  • From: "georg parlow" <georg@websuxxess.com>
  • To: <permaculture@lists.ibiblio.org>
  • Subject: Re: [permaculture] Re: permaculture digest, Vol 1 #392 - 5 msgs
  • Date: Tue, 26 Nov 2002 09:46:41 +0100

> Beware of allelopathy with poplars....
> I saw a poplar windbreak in New Zealand, there was a farm track between
> the trees and the farmers field of sweet corn - the allelopathic impact
> of the poplars was the most dramatic visual example I've observed yet.
> Near the track germination was sparse and plants severely stunted (barely
> 18 inches high), the density and plant size gradually and uniformly
> increased with increasing distance from the trees and at 1 and half times
> the hight of the poplars into the field the plants were dense, lush and
> over 6 foot high. The sunflower crop on the other side had exactly the
> same phenomena.

i doubt that this is allelopathy, but would suspect nutrient competition won
by the poplars.

georg





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