This study considers changes occurring on a soilsurface after exposure to simulated rainfall. The soilsurface in question has a crop cover of artificial maize, and interest focuses specifically on the surface features produced by leaf drips. An analytical photogrammetric approach is used to examine surface morphological change at a small scale (1 mm). These topographical changes are then related to sub-surface crust development as observed by the use of impregnated polished blocks. For the first time therefore soilsurface and soil sub-surface changes are integrated together in one study. The results reveal a `cut and fill' type process in which aggregate welding and breakdown operate in parallel.