However, there is a significant challenge to distinguish between organic materials and the water phase, due to their similarities in X-ray attenuation coefficients. This is critical to transport measurements since organic matter is extremely prevalent in soil, so images of pore structure based on mineral phases alone are insufficient to fully determine the paths that water can follow. Rather there is a need to directly and dynamically visualize aqueousphase flow and transport. Similarly, while segmentation of organic phases becomes easier for large extended structures such as some plant root systems, using e.g. advanced computational workflows or low-energy X-rays , segmentation at shorter length-scales remains extremely challenging.