Dr Sami Ullah is academic lead for the BIFoR FACE research facility in Staffordshire. His research is mainly focused on the biogeochemistry of nitrogen and its linkages to carbon and phosphorus cycling under global change in soils under forest, peatland/wetland, grassland, and agricultural crops. The impetus of his research is to advance mechanistic understanding of the response of key microbial functions such as denitrification, nitrogen and carbon mineralization, biological nitrogen fixation, greenhouse gas fluxes and soil enzyme activity to land-use and climate change at catchment scale.