TY - RPRT T1 - Natural vegetation responses to atmospheric nitrogen deposition - critical levels and loads of nitrogen for vegetation growing on contrasting native soils Y1 - 1997 A1 - Carroll, J.A. A1 - Caporn, S.J.M. A1 - Morecrof, M.D. A1 - Lee, J.A. A1 - Johnson, D. A1 - Taylor, A. A1 - Leake, J.R. A1 - Campbell, C.D. A1 - Cawley, L. A1 - Lei, Y. A1 - Read, D.J. PB - University of Sheneld CY - Sheneld ER -