Part 1 Keynotes: 1. Soil and water quality at different scales: concepts, challenges, conclusions and recommendations; J. Bouma, et al. 2. Relevance of scale dependent approaches for integrating biophysical and socio-economic information and development of agroecological indicators; J. Dumanski, et al. 3. Scale issues in agroecological research chains; R.J. Wagenet. 4. Obtaining soil and land quality indicators using research chains and geostatistical methods; M.R. Hoosbeek, J. Bouma. 5. Some considerations on methods for spatially aggregating and disaggregating soil information; A.B. McBratney. Part 2 Agroecological and Hydrological Case Studies: 6. Small scale variability in the flow of water and solutes, and implications for lysimeter studies of solute leaching; L.P. Simmonds, S. Nortcliff. 7. Solute transport at the pedon and polypedon scales; D.E. Radcliffe, et al. 8. Space-time upscaling of plot-based research information: frost tillage; H.M. van Es, et al. 9. Mapping and interpreting soil textural layers to assess agri-chemical movement at several scales along the eastern seaboard (USA); T. Steenhuis, et al. 10. Status and trends of soil salinity at different scales: the case for the irrigated cotton growing region of eastern Australia; I.O.A. Odeh, et al. 11. Investigating soil and groundwater quality at different scales in a forested catchment: the Waldstein case study; G. Lischeid, et al. 12. Slope deposits and water paths in a spring catchment, Frankenwald, Bavaria, Germany; K. Arno, et al. 13. Hydromorphic soils, hydrology and water quality: spatial distribution and functional modelling at different scales; P. Curmi, et al. 14. Upscaling a simple erosion model from small areas to a large region; D. King, et al. 15. Research on soil fertility decline in tropical environments: integration of spatial scales; J.J. Stoorvogel, E.M.A. Smaling. 16. Soil absorbing complex properties of Russian boreal soils and its dependence on the spatial scale of study area; J.L. Meshalkina, et al. 17. The influence of nitrate reduction strategies on the temporal development of the nitrate pollution of soil and groundwater throughout Germany: a regionally differentiated case study; F. Wendland, et al. 18. Food supply capacity study at global scale; J.J.R. Groot, et al. Part III: Methods for Scale Transfer. 19. Upscaling hydraulic conductivity: theory and examples from geohydrological studies; M.F.P. Bierkens, J.W.J. van der Gaast. 20. Modelling cadmium accumulation at a regional scale in the Netherlands; A. Tiktak, et al. 21. The use of upscaling procedures in the application of soil acidification models at different spatial scales; W. de Vries, et al. Part IV: Review Papers. 22. Modelling concepts and their relation to the scale of the problem; T.M. Addiscott. 23. Prediction error through modelling concepts and uncertainty from basic data; M.J.W. Jansen. 24. Uncertainty analysis in environmental modelling.