28 
26 
c 
c 
W) 
24 
-o 
22 
o 
*5 
<D 
C- 
20 
00 
2 
18 
> 
< 
16 
14 
16 
18 20 22 24 26 28 
lab %N 
Figure 3: Predicted Lignin vs Measured Lignin - Blackhawk Island and Harvard Forest Sites. 
Calibration plots ( + ), validation plots (o). Standard Error of Calibration = 1.29, R 2 = .82, 
Standard Error of Prediction = 1.33 
Figure 4: Blackhawk Island - Percent Canopy Lignin as calculated with equation 2