permaculture

[Scott Pittman <pci@permaculture-inst.org>]

At 12:07 PM 2/10/04 -0500, you wrote:
> Hi all,
> Do acid rains have any measurable, negative effect on organic crops, in 
> term of the health of people eating those crops?
> Put it another way are organic, certified crops tested also for their 
> content in toxic materials coming from the sky?
> Are there any studies available on this subject?
> There seems to be little that the farmer can do about that.
> Cheers
>
> Antonio Scotti
> =========================================

Acid rain is mainly negative in that it acidifies the soil which, if too 
acid, loses its minerals and micro-nutrients.  It also releases some 
minerals from parent material that may be toxic to plants in high 
concentrations ie copper, aluminium, etc.