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[EMAIL PROTECTED] (Mike Darrett) wrote in message news:<[EMAIL PROTECTED]>... > Could you supply a couple of references for this? A google search > says arsenic kills cows, and is something to be avoided. Arsenic kills just about anything, but it isn't the worst poison in the world by any means. The lethal dose for a grown human is about 150 mg arsenious oxide. I think you would find quite a few references in the agriculture literature, especially in the older stuff. I'm not sure it's even used anymore, mostly for public relations reasons. Bill Penrose
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