Crop residue trials as well as soil dissipation/ leaching / accumulation trials in the European Union are undertaken by our own staff in UK, Northern and Southern France, Northern and Southern Germany, the Netherlands, Denmark, Poland, Bulgaria, Hungary, Spain, Portugal, Italy and Greece. National projects may be managed by each team themselves or from our German centre, international multi-site studies are always managed from our German centre. Stations are GLP compliant and were generally audited by the national authorities. Residue trials are closely linked with residue analysis and processing.