REPRODUCTION OF WESTERN YELLOW PIX).; 



279 



Reasonably prompt restocking after cutting is one of the obvious 

 requisites to successsful silviculture. Comparatively little loss due to 

 overmaturity and disease is expected on Forest Service cuttings, be- 

 cause practically all trees thus affected are removed in cutting. On 

 the other hand, a great increase in number of trees due to development 

 of advance growth and reproduction should take place. In reality, 

 however, only one of the plots considered in this study shows ap- 

 preciable progress in this direction. Although trees below 4 inches 

 d. b. h. are not recorded, it is possible to predict from observations 

 whether or not a stand is on the way toward satisfactory restocking. 

 Thus, a great increase on plot 2 during the next 5 or 10 years is 

 anticipated ; on plot i there will be a slow but substantial increase, but 

 on plots 3 and 4 no appreciable increase can be expected within 20 

 years. This leads to the subject of natural reproduction, which will be 

 discussed later. 



CONDITION OF STANDS 



The percentage of unhealthy trees (Table 3) is a good index to the 

 general condition of the stand. In this study trees are not classified as 

 unhealthy unless they are decidedly so. Thus, many which show slight 



Table 3. — Condition of Stands in 1914 



a Trees infected by mistletoe or injured by porcupines are not necessarily 



"unlicalthv." 



