A SUMMER'S WORK ON EXPERIMENT STATION 53 



(Purshia tridentata), manzanita (Arctostaphylos wua-wrsi) and 

 mountain mahogany. (Cercocarpus parvifolius.) 



The Canadian zone (Douglas fir type) lies between 7,500 and 

 9,000 feet. The important plants of this zone are Douglas fir, 

 White fir, Colorado blue spruce, balsam fir (Abies lasiocarpa) , 

 common juniper (Juniperus communis), limber pine, (Pinus flex- 

 ilis), quaking aspen (Populus tremuloides) , Acer grandidenta*- 

 tum, Rocky Mountain maple (Acer glabrum), chokecherry (Pru- 

 KUS melanocarpa] , wolfberry (Symphori carpos occidentalis) and 

 mountain maple (Pachystima myr smites). 



Coniferous plantations are located in various parts of these 

 zones. They are planted in different sites and on different soil 

 with varying conditions of shade. Examinations of these are made 

 one in the Spring and one in the Fall. The examination consists 

 in plotting the species on a chart and noting the number living, 

 dead or missing, their condition, weak or vigorous and the amount 

 of growth the preceding season. 



Aspen and coniferous reproduction studies, seed collection, 

 nursery work, collecting soil samples, collection of an herbarium, 

 the laying out of sample experimental plots and other special 

 studies are some of the other phases of experimental work. 



A field season spent at experimental work is a profitable 

 one. It is instructive because it requires close application and a 

 regard for detail. It serves to develop originality in treating with 

 unexpected problems and it is interesting because of the very 

 nature of the work itself. 



