20 forestry Quarterly. 



The total number of trees per acre was 71 of which Douglas 

 Fir 33, Lodgepole Pine 29, and the others 9. The average height 

 of merchantable trees in this type was 60 feet and the maximum 

 height no feet. The average diameter of all the trees was 15 

 inches, but the maximum diameter of Douglas Fir was 7 feet, 

 which is very uncommon in this region, while that of Lodgepole 

 Pine was only 27 inches. 



Reproduction under cover in this type was found from several 

 hundred sample plots to be as follows : 



This seems to indicate that wherever given any chance Douglas 

 Fir will dominate in the reproduction and will advance under a 

 fairly dense cover. The average density of this type was found to 

 be 6.68. The principal aspects occupied by this type were found 

 to be on the north, northeast and east slopes, in order of their 

 importance ; while the southern slopes are most rarely so oc- 

 cupied in this respect the type behaving identically as the Pure 

 Lodgepole Pine type. A close observation of local conditions, 

 such as soil, moisture, slope, aspect, etc., develops that the Pure 

 Lodgepole Pine and mixed Douglas Fir types grow on practically 

 the same kinds of soils and other site conditions. These statistics 

 seem to indicate that as is commonly supposed, Lodgepole Pine 

 soil is adapted to either pure Douglas Fir or the Fir in mixture 

 with Lodgepole Pine and Engelmann Spruce. 



Other Silvicultural Characteristics. 



Lodgepole Pine grows uniformly in even-aged stands and 

 reaches its highest development in the pure type. It does best on 

 northerly and protected, moist, yet well drained fertile slopes. 

 While here it attains its greatest development, it grows on a wide 

 range of soil and site conditions and will withstand considerably 

 drought, although refusing to grow on warm southern slopes in 

 association with Western Yellow Pine. If atmospheric moisture 



