{\rtf1\ansi\deff0\deftab360

{\fonttbl
{\f0\fswiss\fcharset0 Arial}
{\f1\froman\fcharset0 Times New Roman}
{\f2\fswiss\fcharset0 Verdana}
{\f3\froman\fcharset2 Symbol}
}

{\colortbl;
\red0\green0\blue0;
}

{\info
{\author Biblio 7.x}{\operator }{\title Biblio RTF Export}}

\f1\fs24
\paperw11907\paperh16839
\pgncont\pgndec\pgnstarts1\pgnrestart
 J. L.  Campbell, et al., ?Long-term trends from ecosystem research at the Hubbard Brook Experimental Forest?, Gen. Tech. Rep. NRS-17. Newtown Square, PA: U.S. Dept. Agriculture, Forest Service, Northern Research Station, p. 41, 2007.\par \par  P. M.  Groffman, et al., ?Calcium Additions and Microbial Nitrogen Cycle Processes in a Northern Hardwood Forest?, Ecosystems, vol. 9, p. 1289-1305, 2006.\par \par  C. T.  Driscoll, et al., ?Acidic deposition in the northeastern United States: Sources and inputs, ecosystem effects and management strategies?, in J. M. Gunn, R. J. Steedman, and R. A. Ryder (eds.), 2004, p. 159-190.\par \par  P. M.  Groffman, et al., ?A new governance structure for the Hubbard Brook Ecosystem Study?, Bull. Ecol. Soc. Am., vol. 85, p. 5-6, 2004.\par \par  P. M.  Groffman, et al., ?Nor gloom of night: A new conceptual model for the Hubbard Brook Ecosystem Study?, BioScience, vol. 54, p. 139-148, 2004.\par \par  I.  Fiorentino, T. J.  Fahey, P. M.  Groffman, C. T.  Driscoll, C.  Eagar, and T. G.  Siccama, ?Initial responses of phosphorus biogeochemistry to calcium addition in a northern hardwood forest ecosystem?, Can. J. For. Res., vol. 33, p. 1864-1873, 2003.\par \par  J. D.  Blum, et al., ?Mycorrhizal weathering of apatite as an important calcium source in base-poor forest ecosystems?, Nature, vol. 417, p. 729-731, 2002.\par \par  C. T.  Driscoll, et al., ?Response to W. E. Sharpe's "Acid deposition explains sugar maple decline in the East"?, BioScience, vol. 52, p. 5-6, 2002.\par \par  R. K.  Kobe, G. E.  Likens, and C.  Eagar, ?Tree seedling growth and mortality responses to manipulations of calcium and aluminum in a northern hardwood forest?, Can. J. For. Res., vol. 32, p. 954-966, 2002.\par \par  C. T.  Driscoll, et al., ?Acid rain revisited: advances in scientific understanding since the passage of the 1970 and 1990 Clean Air Act Amendments?, vol. 1. p. 1-20, 2001.\par \par  C. T.  Driscoll, et al., ?Acidic deposition in the northeastern United States: sources and inputs, ecosystem effects, and management strategies?, BioScience, vol. 51, p. 180-198, 2001.\par \par  T. W.  Berger, C.  Eagar, G. E.  Likens, and G.  Stingeder, ?Effects of calcium and aluminum chloride additions on foliar and throughfall chemistry in sugar maples?, For. Ecol. Manage, vol. 149, p. 75-90, 2001.\par \par }