Nitrogen excess in North American Ecosystems: A review of predisposing factors, geographic extent, ecosystem responses, and management strategies

Fenn, M. E., Poth, M. A., Aber, J. D., Nitrogen excess in North American Ecosystems: A review of predisposing factors, geographic extent, ecosystem responses, and management strategies, Ecol. Appl., 8 (3), 706-733, 10.1890/1051-0761(1998)008[0706:NEINAE]2.0.CO;2