I am interested in land-use change and its effects on soils and vegetation in the dynamic earth system. Specifically, I study the long-term effects of tree-planting and plantation forestry on soil nutrients and plant productivity. My research focuses on the extreme case of eucalyptus plantations in Southeastern Brazil, whose rapid growth yields efficient pulp and paper production and potential bioenergy feedstock, as well as concerns about depletion of water and nutrients from the soil. I combine remote sensing, soil chemistry, and meta-analysis techniques to address these concerns at large spatial and temporal scales.