Quadrat Method in Forestry Investigations 



21 



been undertaken at the Utah Forest Experiment Station located 

 on the Manti National Forest in the Wasatch Mountains of Cen- 

 tral Utah. 



To throw light upon the many phases of the aspen manage- 

 ment study, several plots containing from a half acre to an acre 

 of area have been depopulated of the species under discussion in 

 varying degrees of intensity through the application of orie of the 

 thinning methods. Near the center of the plot where the light 

 effects are uniform, unit sub-plots 10 feet square have been estab- 

 lished in groups of from 2 to 15, as shown in Fig. 3. These were 

 established immediately after depopulating or before appreciable 

 changes in ecological and edaphic conditions had stimulated vege- 

 tative activity. The location of aspen stumps, sprouts, and in 

 some cases other vegetation, were charted, each square foot of 

 the 10 ft. unit being the chart sub-unit, as shown in Fig. 4. 



V 



3. 



Plot No. 1. Clear cutting at different seasons of even aged 120 

 year aspen stand. S'cale 60 feet 1 inch. 



From chart records of the various unit sub-plots, similar 

 to and including the one sketched, the exact number of sprouts 

 produced, under the different methods of cutting, their origin and 

 fatality, as well as the height-growth in the first and subsequent 



