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There is no universal standard plant test used by testing agencies, although the OECD guideline No. 208 (OECD, 1984a) is often quoted for soil contaminants and the USAEPA OPPS guidelines are utilised specifically for plant protection products. The plant testing conditions are based on a combination of the OECD guideline, and a comprehensive guideline published by the American Society for Testing and Materials (ASTM 1994, # E1598-94).
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