Chronic N Green Foliage Data 1988-1998 Samples (not collected in 1999 or 2002) Collected in early August each year. Means and standard deviations of foliar samples measured as percent nitrogen, lignin and cellulose using near-infrared spectroscopy. Black Birch in Hardwood Plots. "." indicates missing data point year treat species n av%n sd%n av%lig sd%lig av%cel sd%cel 88 HC BB 4 1.69 0.27 24.10 1.08 38.09 2.30 89 HC BB 4 2.43 0.12 24.14 0.43 41.74 0.71 90 HC BB 3 2.30 0.08 22.28 1.07 40.51 1.79 91 HC BB 4 2.28 0.10 22.36 0.76 41.08 0.74 92 HC BB 4 2.32 0.07 22.72 0.67 40.22 0.46 93 HC BB 4 2.29 0.09 22.29 0.75 40.58 1.79 94 HC BB 4 2.29 0.08 23.44 1.05 41.35 1.15 95 HC BB 4 2.20 0.03 22.36 0.36 40.67 1.27 96 HC BB 4 2.48 0.10 23.82 0.89 41.42 1.63 97 HC BB 4 2.35 0.10 21.41 1.39 39.28 1.06 98 HC BB 4 2.35 0.06 22.65 0.72 39.38 0.81 88 HL BB 4 1.93 0.18 25.00 0.31 42.40 2.23 89 HL BB 4 2.37 0.02 22.73 0.74 42.04 1.35 90 HL BB 4 2.52 0.10 24.47 0.83 38.41 0.42 91 HL BB 4 2.56 0.08 22.56 0.39 41.83 1.10 92 HL BB 4 2.63 0.06 23.24 0.19 40.99 0.68 93 HL BB 4 2.48 0.09 22.71 0.88 40.80 0.98 94 HL BB 4 2.47 0.07 23.87 0.40 39.95 1.27 95 HL BB 4 2.47 0.07 23.05 0.81 40.65 1.69 96 HL BB 4 2.69 0.09 23.40 0.09 41.81 0.81 97 HL BB 4 2.65 0.13 21.34 1.06 40.18 0.68 98 HL BB 4 2.71 0.19 22.26 0.90 41.07 0.28 88 HS BB 4 1.98 0.12 23.40 0.70 39.24 1.44 89 HS BB 4 2.38 0.10 23.58 0.76 41.20 0.70 90 HS BB 4 2.48 0.07 24.87 0.60 38.91 0.72 91 HS BB 4 2.61 0.06 24.20 0.14 40.04 1.65 92 HS BB 4 2.51 0.04 23.44 0.56 40.69 0.77 93 HS BB 4 2.39 0.05 22.89 0.84 39.99 0.80 94 HS BB 4 2.41 0.07 23.51 0.56 39.63 0.95 95 HS BB 4 2.31 0.04 23.27 0.57 39.25 0.67 96 HS BB 4 2.63 0.05 23.58 0.76 40.75 1.82 97 HS BB 4 2.55 0.10 22.24 0.60 37.27 0.81 98 HS BB 4 2.59 0.13 23.99 0.24 38.14 1.28 88 HH BB 4 2.08 0.19 23.55 0.69 40.21 1.14 89 HH BB 4 2.65 0.09 24.50 0.46 42.33 0.88 90 HH BB 4 2.66 0.10 24.86 0.86 40.87 0.45 91 HH BB 4 2.91 0.14 23.04 0.61 42.64 0.53 92 HH BB 4 3.11 0.12 23.26 0.69 42.80 0.73 93 HH BB 4 2.83 0.04 23.21 0.80 41.32 0.51 94 HH BB 4 2.76 0.03 23.74 0.71 41.46 0.39 95 HH BB 4 2.75 0.21 23.46 0.52 42.99 1.06 96 HH BB 4 3.07 0.23 24.49 1.67 40.34 1.40 97 HH BB 1 2.82 . 22.30 . 38.40 .