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Excerpts from the report: People have speculated, and argued, about relationships between soils and human health for a long time. Some questions have not been answered to everyone's satisfaction, but reasonable answers to some others have emerged from the results of scientific research and from experience. These questions can be answered only in respect to specific plants, animals, and kinds of soil. The purpose of this bulletin is to examine some of these questions in the light of current knowledge of the food chain from soils to plants to animals and man.


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