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In the paper we studied toxicity of petroleum on germination and seedling stage of plant using phytotoxicity tests. These tests measure the decrease or absence of germination and root elongation only after a few days of exposure to contaminated soils compared to unpolluted soil (control). The plant seeds used were rape (Brassica napus), white mustard (Sinapis alba), peas (Pisum sativum) and rye (Secale cereals). The soil used in the experiments was a reference OECD soil for these types of tests. The soil was pollu...