Tutorials in Soil Physics - These tutorials range in difficulty from college sophomore to the senior/graduate/postdoctoral level. They begin with the basics and extend to a new exact solution to Richards' equation for unsaturated horizontal and vertical flow. Preferential Flow (Cornell University) - A pedagogical resource about preferential flow in soils, for educator, regulator and extension services. Preferential flow are fast water flow, often involved pollutant transport. Hydropedology (IUSS Working Group) - International Union of Soil Science Working Group on Hydropedology. A multidisciplinary and multiscale approach of soil and water transfer. iSOIL Project - A research project with an integrated approach, liking soil physics, geophysics, and digital soil mapping techniques. EU-FP7 collaborative project. Soil and Water (e-dis, UFL) - An on-line course on soils and water: Irrigation, nutrient and pesticide transport, soil/water measurement methods, etc. University of Florida. Soil Physics (Oklahoma State University) - A collection of models for water flow and solute transport in soils, for scientists, decision makers and students (with theory presentation and exercises)