@article {85, title = {The relationship between nitrogen deposition, species composition and foliar nitrogen concentrations in woodland flora in the vicinity of livestock farms.}, journal = {Environmental Pollution }, volume = {102}, year = {1998}, pages = {41-48}, author = {Pitcairn, C.E.R. and Leith, I.D. and Sheppard, L.J. and Sutton, M.A. and Fowler, D. and Munro, R.C. and Tang, S. and Wilson, D.} }