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[Lucky Pittman <lucky.pittman@murraystate.edu>]

At 02:58 PM 5/18/2005, Tom wrote:
> As far as I know, copper is not good for many living things.

Tom,
As is the case with so very many 'poisons', the dosage is the important thing.
Copper is an essential micronutrient for both plants and animals, required 
as a co-factor for various enzyme systems, etc.
Copper deficiency is a very common finding in all livestock species in my 
area of the country, unless they are adequately supplemented with an 
appropriate copper source - our soils are Cu-deficient, and thus, our 
forages are likewise.
Too much copper, however, can be a bad thing.

Lucky