5d 



Another area was examined by Show to ascertain the 

 damage resulting to the reproduction froM Light Burning. 

 This was at Castle Rock, California, on an area, of 8 acas. 

 The fire was the lightest which could have spread. Af- 

 ter examinations 4 times at varying intervals after the 

 fire, it was learned that practically all of the seed- 

 lings, saplings and poles of all species (yellow pine, 

 incense cedar and douglas fir) below 2" D.B.H. and l5 

 years of ?ige, were killed, and 60^ of the young trees 

 "between 15-25 years were also killed. 



Upon an area ideal for Light Burning, namely that 

 of T . B. Walker, near Westwood, California, which was 

 burned in October 1910, S. B. Show made an examination 

 in 1915. "to determine the damage resulting. Reproduct- 

 ion mostly yellow pine and white fir, was everywhere 

 abundant. On three areas of 250O square feet, selected 

 where the damage was greatest, 83^ of the white fir, 

 and 75^ of the yellow pine seedlings, Saplings and poles 

 were killed. There still remained alive 436 seedlings 

 per acre of which 'J^% were yellow pine. Evenwhere the 

 damage was heaviest, the remaining seedlingsvere still 

 equal to the number used in extensive planting. It 

 must be borne in mind, however, that this was the-first 

 time the area had been light Burned. Succeeding light 

 fires would surely reduce the remaining young growth 

 far below that required to sufficiently restock the area. 



Studies of damage to reproduction in this region 

 shurw that natural regeneration cannot take place if re- 

 nftated lifitht surface fires occur. Deterioration of site 



