Table 6. --Types and locations of seedbeds tested for establishing natural regeneration 





' Year of 

 ' treatment 







Seedbed treatment 





Location 



: None : 



( p nn 1" to 1 ~) 



Bui ldozer 



cfari -p-v/ 1 n 

 j Lai A. 1. y J.11 



: Athens : Broadcast 



i • UlJ^lllg . U LI J. 1 1 J. 1 1 V 



: Hand piling 

 : and 



uui in Jig j i a jii 



Bluesky 

 War land 

 Jackson 

 Dunn and 

 Butler 



1948 

 1948 

 1948 



1951 



X 

 X 

 X 



X 



X 

 X 



X 



X 

 X 



X 



X 



Methods 



The effectiveness of different types of seedbeds for establishing natural regen- 

 eration was tested in various combinations at several locations (table 6) . Seedbeds 

 were prepared by : 



1. Bulldozer scarification. --Exposed, some mineral soil, piled slash, and 

 disposed of some unmerchantable Douglas-fir. 



2. Athens discing . --Exposed some mineral soil, but far less than by bulldozer 

 scarification . 



3. Broadcast burning . --Removed accumulations of logs and slash from the base of 

 seed trees before treatment. 



4. Hand piling and burning . --Exposed mineral soil only where the slash piles were 

 burned. 



A total of 730 systematically located milacre quadrats were established on the five 

 seedbed conditions shown in table 6. 



Results 



Ponderosa pine was clearly a serai species on these study areas as demonstrated 

 in the following tabulation of advance regeneration on untreated plots: 



Seedlings per acre Stocking 

 (Number) (Percent) 



Ponderosa pine 51 4 



Douglas-fir 1,415 48 



1 1 



