Table 1 .—The number of samples, mean, standard deviation, and range for copper, iron, 



and sulfate in the soil water samples, mg/liter 



Revegetated area 



1974-75 



1977-79 



Untreated area 



1974-75 



1977-79 



Copper, Cu 



Total iron, Fe 



Sulfate, SO, 



n=57 

 x=3.43 

 S.d. =10.13 

 range=0 to 60.1 



N=57 

 x=0.41 

 S.d. =0.47 

 range=0 to 1 .9 



n=52 



x=585.75 



S.d.=486.56 



n=53 

 x=2.30 

 S.d. = 7.73 

 range=0 to 44.2 



n=53 

 x=0.1 1 

 S.d.=0.22 

 range=0 to 1 .3 



n=50 

 x=271.08 

 S.d.= 292.77 



n=31 

 x=2.67 

 S.d =9.42 

 range=0 to 52.0 



n=35 

 x=0.60 

 S.d.=0.62 

 range=0 to 2.6 



n=27 

 x=498.41 

 S.d. =459.89 



n=25 

 x=0.72 

 S.d.= 1.65 

 range=0 to 7.8 



n=26 

 x=0.16 

 S.d.=0.47 

 range=0 to 2.4 



n=25 

 x=220.41 

 S.d.= 233.49 



range=1 9 to 1 ,477 range=5 to 1 ,040 range= 1 to 1 ,462 range=<1 to 745 



Table 2.— Sampler groups resulting if the dendrogram is cut at a distance of 0.75 



Group 



Number of 



samplers 



Number in 

 revegetated area 



Number in 

 untreated area 



1 

 2 

 3 



4 

 5 

 6 

 7 



10 

 8 

 8 



2 

 1 

 2 

 1 



4 

 3 

 3 

 1 



Based on the evidence in figure 1 and table 1, 

 we conclude there probably was no difference in 

 the soil-water quality underlying the revegetated 

 and untreated areas in this sample period. 



Revegetated vs. Untreated 

 Areas, 1977-79 



The dendrogram for this sample period on the 

 revegetated and untreated areas indicates no 

 strong similarities within either area (fig. 2). Wher- 



ever the tree is cut, there is no convincing group- 

 ing of samplers within the revegetated or un- 

 treated areas. 



Based on the evidence in table 1 and figure 2, 

 we conclude there were no differences in the soil- 

 water quality underlying the revegetated or un- 

 treated areas in this period. 



4 



