Long Description of Figure 4:

Graph showing percent of original nitrogen mass in decomposing Douglas-fir needles in Washington and ponderosa pine needles in Arizona -- Douglas-fir (WA): Nitrogen content rises from 100% to 150% over first three months, Nitrogen content drops from 150% to 115% over next three months, Nitrogen content drops from 115% to 110% over next 6 months, Nitrogen content drops from 110% to 88% over next year; Ponderosa pine (AZ): Nitrogen content drops from 100% to 99% over first three months, Nitrogen content drops from 99% to 95% over next three months, Nitrogen content drops from 95% to 92% over next 6 months, Nitrogen content rises from 92% to 110% over next year, Nitrogen content drops from 110% to 92% over next 10 months