The phosphorus status of northern hardwoods differs by species but is unaffected by nitrogen fertilization
Weand, M. P., Mary A. Arthur, Gary M. Lovett, F. Sikora, and Kathleen C. Weathers. 2010. “The Phosphorus Status Of Northern Hardwoods Differs By Species But Is Unaffected By Nitrogen Fertilization”. Biogeochemistry 97: 159-181. http://www.caryinstitute.org/reprints/Weand_et_al_2010_Biogeochemistry.pdf.