510 



FORESTRY AND IRRIGATION 



November 



The red fir has much the same pow- 

 er of germinating on burned over 

 areas, and will stand a much greater 

 dryness than lodgepole pine. On steep 

 southern slopes the dry conditions are 

 too intense for lodgepole to maintain 

 itself; the red fir has undisputed pos- 

 session of the ground. In many lo- 



The study of the ecological devel- 

 opment in the successive steps to re- 

 foresting of denuded and burned over 

 areas is made much easier because of 

 this peculiar, yet fortunate, power of 

 the lodgepole pine to establish itself 

 over such areas. With the ground ex- 

 posed by fire to the hot summer sun, 



Slopes on Northern Side of Grayback Range, San Bernardino Forest Reserve, California, 

 Bearing Lodgepole Pine and Limber Pine. Altitude 11 000 Feet. 



calities lodgepole pine and red fir 

 were observed coming up together in 

 equal quantities. The red fir showed 

 a somewhat slower growth than lodge- 

 pole, but since it is able to withstand 

 some shade, it maintains itself with 

 ease. 



the soil bakes and cracks, and it hard- 

 ly seems possible that any except the 

 most zerophytic types of vegetation 

 could exist in such dry situations, but 

 the seed of the lodgepole pine find 

 here a favorable germinating bed, and 

 in a few years after the burn, young 



