2. Materials and Methods2.1. Select

2. Materials and Methods
2.1. Selection and preparation of soils
The soils used in this study are a subset of the 43 soils described by Liyanage et al. (2006). Nine soils from the previous study could not be included either because the C content was so low that HF-treatment was impractical or there was insufficient soil remaining to complete the analyses. Basic physical and chemical properties (pH, EC and clay, silt and sand contents), along with KOC data for the whole soils for diuron and carbaryl can be found in Liyanage et al. (2006).