Abstract
The content of mercury, lead, cadmium, copper, zinc, chromium, and nickel in the agricultural soils of southern and western Manitoba was investigated. The background levels of these metals in uncontaminated soils as well as the extent of contamination from agricultural, automotive, and urban sources was determined. Heavy metal concentrations in the surface soils were found to be closely related to concentrations in the soil parent materials. Agricultural practices had no detectable effect on the heavy metal content of the soil. Some accumulation of lead was found in soils adjacent to highways and in the Winnipeg urban area. In general, there was little or no contamination of agricultural soils with mercury, cadmium, copper, zinc, chromium, or nickel.
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