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Developments of bioassay protocols for toxicants in soil

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Title: Developments of bioassay protocols for toxicants in soil
Author: Sheppard, S. C.
Abstract: The report describes the development of three whole soil bioassay protocols (Brassica rapa, earthworms, and microarthropods) and gives the details of the optimal methods of their practical use. It also describes the results of the application of these bioassays to determine the effects of two contaminants; zinc and mercury. Detrimental effects were observed on Brassica rapa at 10 - 20 mg Hg/kg of soil in sand, at 220 mg Hg/kg in clay, and at 50 mg Zn/kg soil in sand and 600 mg Zn/kg in clay. Earthworms were more sensitive than Brassica rapa to Hg in garden soil, but less so in sand. Also, a novel method of conducting whole soil bioassays on arthropods was developed. The results emphasize the need for whole soil bioassays on different species to properly assess terrestrial toxicity of contaminants.
Date: 1994
Rights: Queen's Printer for Ontario, Crown Copyright, Non-Commercial Use Permitted
Rights Holder: Queen's Printer for Ontario

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