Groffman, P.M., C.O. Williams, R.V. Pouyat, L.E. Band and I.C. Yesilonis. 2009. Nitrate leaching and nitrous oxide flux in urban forests and grasslands. Journal of Environmental Quality 38:1848-1860.
Kaushal, S.S., P M. Groffman, L.E. Band, C.A. Shields, R.P. Morgan, M.A. Palmer, K.T. Belt, C.M. Swan, S.E.G.Findlay and G.T. Fisher. 2008. Interaction between climate and land use amplifies watershed nitrogen export. Environmental Science & Technology 42:5872-5878. DOI: 10.1021/es800264f
Groffman, P.M., N.L. Law, K.T. Belt, L.E. Band and G.T. Fisher. 2004. Nitrogen fluxes and retention in urban watershed ecosystems. Ecosystems 7:393-403.
BES LTER scientist sampling water at a long-term suburban watershed site in Baltimore County, MD.