http://www.soilandhealth.org/01aglibrary/01aglibwelcome.html
This link takes you to a page with a long list of online farming classics. Anyone with an interest in the copper thread may want to research Andre Voisin's books. IIRC, Voisin found that soils low in copper causes trouble for livestock AND that soils too high in copper caused trouble for livestock. Anyone getting ready to spread bluestone may want to have a copper soil test performed first. Regards, Rex Harrill
