%0 Generic %D 2005 %T Decline of acidā€sensitive plant species in heathland can be attributed to ammonium toxicity in combination with low pH. %A Van Den Berg, L.J. %A Dorland, E. %A Vergeer, P. %A Hart, M.A.C. %A Bobbink, R. %A Roelofs, J.G. %B New Phytologist %V 166 %P 551-564 %G eng %N 2