Marc Voltz Marc Voltz is research director at INRAE and a corresponding fellow of the French Academy of Agriculture. He also used to be consulting Professor in soil hydrology at the School of Agronomy in Montpellier. His main topics of research concern water and pollutant transport processes in soils, pesticide fate in the environment, catchment hydrology, distributed hydrological modelling, soil mapping methods. He founded in 2002 in Montpellier a research group studying the interactions between soil, agriculture and hydrology as well as a long term hydrological observatory in the Mediterranean farmed environment (OMERE https://www.obs-omere.org), which he both headed until 2010. He used then to be the leading scientist of the soil and water resources research topic of the national Environment and Agronomy division at INRAE. He is currently the chair of the scientific advisory board of the French national Soil Inventory, Management and Conservation programme.