ENVIRONMENTAL CONSEQUENCES in rocky mountain coniferous ...

Six sale area blocks were logged (fig. 3), two under each basic silvicultural
system. Each block was subdivided into four treatment areas upon which the four
levels of utilization were applied. Blocks were laid out to take advantage of
existing and new system roads, and purposely included both up- and down-hill yarding.
Back-to-back yarding with the running sky1 ine system a1 lowed laying out the larger
units up to 2,000 feet (609 m) in slope length (blocks 11 and 21 ). Utilization
treatment areas designated for post-harvest broadcast burning were burned the season
following logging.
Figure 3.--Sale area units haruested to meet prescribed levels of
ueiZization, on the Corm study site, included sheztemood,
clearcut, and group sezection siZvicuZturaZ prescriptions.
The Lubrecht Study Site
The Lubrecht study site is located on Lubrecht Experimental Forest, a State-
owned and administered area belonging to the University of Montana. The area is
essentially dry site Douglas-fir, with a significant intermixture of ponderosa pine
and western larch, on gentle terrain. The area has a cutting history of selective
removal of older, larger timber in the late 1800's-early 1900's. The remaining
mixed species and mixed age class stand is broadly representative of a major segment