The weathering paper in Ecosystems
The first file Sandbox vegetation.xls describes N accumulation in vegetation. More information of vegetation is given also in Sandbox tree heights.xls. Soil N changes are described in Sandbox soils.xls including the data for Figures 1 and 2. Finally, data are combined into table 3 to describe ecosystem mass balances Sandbox mass balance.xls.
For more context for the study and paper refer to: http://www.aber.sr.unh.edu/hbrook/current/new_current.htm