This issue's cover: Maps of urban land use and soil productivity overlaid on a photograph showing urban development extending into an agricultural area in the northeastern United States. See "Assessing the Impact of Land Conversion to Urban Use on Soils with Different Productivity Levels in the USA" by Egide L. Nizeyimana, G.W. Petersen, M.L. Imhoff, H.R. Sinclair, Jr., S.W. Waltman, D.S. Reed-Margetan, E.R. Levine, and Joseph Russo, p. 391-402.