Chronic N Green Foliage Data 1988-1999 and 2002 Samples (not collected in 2000 or 2001) Collected in late July or early August each year. Means and standard deviations of foliar samples measured as percent nitrogen, lignin and cellulose using near-infrared spectroscopy. Red Maple in Hardwood Plots. . indicates missing data point year treat species n av%n sd%n av%lig sd%lig av%cel sd%cel 1988 HC RM 4 1.63 0.05 21.50 0.72 31.99 1.76 1988 HH RM 4 1.64 0.17 19.81 0.66 34.02 0.79 1988 HL RM 4 1.60 0.08 20.40 0.29 34.08 1.12 1988 HS RM 4 1.75 0.03 21.29 0.30 32.16 1.07 1989 HC RM 4 1.75 0.13 20.11 0.40 36.32 1.75 1989 HH RM 4 2.01 0.06 20.87 0.48 35.59 0.56 1989 HL RM 4 1.81 0.07 20.07 0.34 38.44 0.23 1989 HS RM 4 1.92 0.15 21.16 0.51 34.85 0.62 1990 HC RM 4 1.68 0.03 18.95 0.81 31.74 0.64 1990 HH RM 4 2.00 0.07 21.19 0.63 34.16 1.73 1990 HL RM 4 1.62 0.07 18.46 0.39 32.14 0.70 1990 HS RM 4 1.90 0.02 20.85 0.33 32.79 1.14 1991 HC RM 4 1.73 0.09 20.52 0.58 32.53 2.21 1991 HH RM 4 2.00 0.18 22.51 0.44 35.87 1.22 1991 HL RM 4 1.76 0.03 21.51 0.95 36.77 1.59 1991 HS RM 4 1.78 0.15 20.21 0.96 33.94 1.96 1992 HC RM 4 1.73 0.18 17.75 0.31 34.43 1.33 1992 HH RM 4 2.41 0.08 20.83 0.72 36.14 1.28 1992 HL RM 4 1.85 0.08 19.17 0.13 34.94 0.95 1992 HS RM 4 2.03 0.05 19.90 0.73 33.22 0.47 1993 HC RM 4 1.60 0.12 17.65 0.83 34.13 0.99 1993 HH RM 4 2.01 0.05 19.22 0.60 37.31 1.58 1993 HL RM 4 1.75 0.09 18.53 0.38 36.23 1.01 1993 HS RM 4 1.89 0.05 19.03 0.45 34.02 1.46 1994 HC RM 4 1.78 0.10 19.49 1.30 32.26 0.77 1994 HH RM 4 2.06 0.13 21.10 0.44 35.09 1.10 1994 HL RM 4 1.85 0.04 20.13 0.55 35.40 0.78 1994 HS RM 4 2.00 0.07 20.21 0.67 33.36 1.31 1995 HC RM 4 1.65 0.06 19.83 0.95 35.03 1.40 1995 HH RM 4 2.09 0.11 21.40 0.52 36.16 0.87 1995 HL RM 4 1.86 0.19 20.77 0.89 35.84 1.39 1995 HS RM 4 1.88 0.04 20.63 0.35 33.61 1.20 1996 HC RM 3 1.74 0.18 19.64 0.34 35.75 0.49 1996 HH RM 4 2.10 0.22 21.41 1.20 34.28 1.51 1996 HL RM 4 1.99 0.26 19.50 1.05 34.37 1.31 1996 HS RM 4 2.02 0.05 20.35 0.72 33.18 1.91 1997 HC RM 4 1.72 0.17 19.40 0.46 33.22 1.30 1997 HH RM 4 2.20 0.14 21.05 0.36 34.10 0.45 1997 HL RM 4 1.84 0.13 20.02 0.78 35.04 0.99 1997 HS RM 4 1.93 0.12 18.94 1.06 32.54 1.08 1998 HC RM 4 1.67 0.10 19.03 1.07 32.06 1.42 1998 HH RM 4 2.35 0.18 20.83 0.76 33.82 1.44 1998 HL RM 4 1.88 0.09 20.49 0.77 32.56 1.03 1998 HS RM 4 1.95 0.11 18.99 0.41 30.36 0.98 1999 HC RM 4 1.90 0.42 18.02 0.78 38.83 6.75 1999 HH RM 3 2.15 0.48 20.18 1.40 31.62 2.98 1999 HL RM 6 1.93 0.19 20.05 1.40 33.78 2.13 1999 HS RM 4 1.75 0.08 19.87 1.66 29.23 1.27 2002 HC RM 10 1.73 0.22 19.44 1.09 32.58 2.44 2002 HH RM 4 2.40 0.34 22.09 0.49 34.46 1.94 2002 HL RM 10 1.92 0.16 20.71 1.30 33.80 1.31 2002 HS RM 10 2.02 0.12 20.51 0.77 32.75 1.61