Harvested Areas 



A number of harvesting sites were studied to compare 

 the visual impact of alternative harvesting methods used, 

 and to determine hovj rapidly areas receiving different 

 treatments recover over time. 



One lodgepole pine stand in the Teton National Forest 

 (now Bridger-Teton) was clearcut in 1971 and four 

 methods were used in treating residues: (1) near- 

 complete removal of residues from the site; (2) residues 

 chipped and spread back over the ground; (3) residues 

 tractor piled into windows and burned; (4) residues broad- 

 cast burned (that is, without piling). 



The panel ratings of these treatments of the first years 

 after harvest are shown in figure 2. Treatments were 

 rated low by all panels the first year but piled/burned was 

 rated higher in year 5. One panel rated all treatments in 

 later years. Their ratings suggest only small differences 

 among treatments, with residue removed rated higher. 

 This may have practical significance to the land manager 

 since there is a growing trend toward utilizing more of the 

 residue fiber from a site which results in near-complete 

 residue cleanup. As to the other treatments, it again 

 appears that debris is a factor in detracting from a site. 

 Detailed summary of this study is table 2. 



Table 2.~Mean ratings of lodgepole pine harvest areas, Teton National Forest, Wyoming 



Treatment 



Viewer panel' 



Meadow-forest edge 

 Mature, uncut 

 Residues removed: 



Year 1 



Year 5 

 Residues chipped and 



spread on site: 



Year 1 



Year 5 

 Residues piled/burned: 



Year 1 



Year 4 



Year 5 



Residues broadcast burn: 



Year 4 

 (Critical diff.)^ 



6.22 

 579 



1.39 



2.13 



119 



2.22 



.60) 



6.15 

 5.93 



1.52 



2.97 



1.46 

 2.65 



(.60) 



-Mean rating- 

 6.56 

 6.72 



1.04 



2.33 



1.07 

 1.99 



(.60) 



692 

 6.19 



2.15 



2,44 



1.37 

 2,80 



(.60) 



7,43 

 5 75 



3,09 

 3,61 



2 71 

 2.25 



2.40 

 2,50 

 2,96 



2.47 

 (.86) 



'Panel numbers refer to 



1. University of fvlontana psychology students, 1973. 



2. University of fvlictiigan psychiology students, 1973; 



3 Montana public sctiool teachiers, 1973; 



4 USDA Forest Service researctiers, 1973, 



5, University of IVIontana psyctiology students, 1977. 

 "This panel did not evaluate ttiis treatment 



'Differences between means that exceed this are significant at the 95 level 



4 



