Seed spacing 

 Oyjord seeder 



10 20 30 40 50 60 70 80 90 100+ 



40 



30 



c 



05 

 O 



q3 20 



CL 



Seedling spacing 

 Oyjord seeder 



Distance between seeds (mm) 



10 20 30 40 50 60 70 80 90 100+ 

 Distance between seedlings (mm) 



40 -^ 



30- 



c 



0) 



o 



20 

 D. 



10 



-+- 



Seed spacing 

 Summit Precision seeder 



r 1 T 



10 20 30 40 50 60 70 80 90 100+ 

 Distance between seeds (mm) 



40 n 



30- 



O 



w 20 



Seedling spacing 

 Summit Precision seeder 



10 20 30 40 50 60 70 80 90 100+ 

 Distance between seedlings (mm) 



Figure 3b — Spacing distribution histograms 

 for ponderosa pine seeds and seedlings 

 from 95 percent germination seedlots at 

 the J. Herbert Stone Nursery. 



Seedling spacing 

 Hand tliinned 



'1" "I" "I 1 1 1 1 1 r 



10 20 30 40 50 60 70 80 90 100+ 



Distance between seedlings (mm) 



14 



