if not interfered with. 



SILVIOAL CHARACTERISTICS OP VT^T^ 13.jf.LOv7 PIUS. 



1. Habit. 



Tlie Western Yellow Pine is a rough-barked 

 massive tree with a rather open conical crown. At 

 maturity, heavy branches and a round era. 711 are de- 

 veloped. Trees grown in the open are short, with 

 wide spreading branches. It has a deep spreading 

 root s^ tern, and in some cases develops a pronounced 

 tap root. 



2. Occurrence: 



It- is found in both pure and mixed stands, 

 and natural stand being pure at the Irwer elevati on 

 and mixed with white fir, su^ar and white pine at 

 the higher and more moist elevations. 



3. Soil and Koisture Requirements. 



All of the soil of this region is of vol- 

 canic origin and is quite similar, No real pumice 

 soil is found on the Fremont. Soil moisture is, 

 however, probably the most important factor in li- 

 miting its occurrence and in a large measure controls 

 the density of the present stand in this region. Com- 

 petition with other more tolerant species prevents 

 the establishment of Yellow Pine in the moist and 

 favorable locations. It lias through necessity, there- 



