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We hypothesized that the combined effect of rising levels of atmospheric carbon dioxide (CO 2 ) and increasing use of genetically modified (GM) crops in agriculture may affect soil food-webs. So we designed a study for the assessment of the effects of elevated CO 2 (eCO 2 ) concentrations and GM barley on a soil-mesofauna community employing a 2nd tier mesocosm test system...
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