Recent advances in tomography have enabled sophisticated approaches to understanding soil and plant relations. The set of biophysicochemical processes occurring at the root/soil interface have a substantial control on plant performance, and understanding and modifying them is key to achieving the goal of future food security. The use of high-resolution and 4D synchrotron computed tomography has recently allowed substantial leaps forward in understanding of nutrient dynamics and soil mechanics at micron scales. However, X-ray tomography provides poor soil/water contrast, and therefore complementary methods such as neutron tomography are required to enable water dynamics around plant roots to be fully elucidated. Ideally, X-ray and neutron tomography would be carried out on the same samples, enabling a very rich description of mineral and water distributions to be produced.