Microcosm soil characteristics Texture Sand Silt Clay pH in water O.M. %C %N cmolc / dm3 mg / dm3 Al Ca+Mg Ca Mg P K Sand-clay 40 % 16 % 44 % 5.0 3.36 1.95 0.18 0.2 7.2 5.3 1.9 18.9 56

Table 1: Characteristics of soil used in the experiments with radiolabeled and no radiolabeled hexazinone.