Professor Sami Ullah is Chair in Biogeochemistry and Director of the Birmingham Institute of Forest Research (BIFoR) at the University of Birmingham UK. He is also the academic lead for the BIFoR Free Air CO2 Enrichment (BIFoR-FACE) facility in a mature temperate forest in the UK. His research is focused on blending experimental manipulations (e.g. elevated [CO2], atmospheric reactive nitrogen deposition, and soil management) to answer fundamental questions about changes in plant-soil-microbe interaction trajectories, plant nutrition, soil nitrogen and carbon transformations, and soil greenhouse gas fluxes. This research is underpinned by the development and application of field analytical techniques including stable isotopes tracing and high-resolution sensor technologies to explore novel relationships between ecosystem’s biogeochemical responses to environmental change. The outcome of his research is fundamental for designing soil, land use and ecosystem management strategies, and predicting the future functioning of natural ecosystems under land use and climate change scenarios.