Seed spacing 

 Oyjord seeder 



^ 1 -- -- , 1 1 1- 



10 20 30 40 50 60 70 80 90 100+ 

 Distance between seeds (nnm) 



40 



30- 



c 



0) 



o 



Q) 20 

 a. 



10 



Seedling spacing 

 Oyjord seeder 



I I I I "I"- "^1^-^ mm^-mw » | «r | 



10 20 30 40 50 60 70 80 90 100+ 

 Distance between seedlings (nnnn) 



40-1 



30- 



c 



0) 



o 



05 20 



CL 



10 - 



Seed spacing 

 Summit Precision seeder 



"~-V"~T - 1 1 r 



10 20 30 40 50 60 70 80 90 100+ 



Distance between seeds (mm) 



Seedling spacing 

 Summit Precision seeder 



10 20 30 40 50 60 70 80 90 100+ 

 Distance between seedlings (mm) 



Figure 4a — Spacing distribution 

 histograms for jack pine seeds and 

 seedlings from 95 percent germination 

 seedlots at thie J. W. Tourney Nursery. 



40 



30 



c 



o 



05 20 

 Q. 



Seedling spacing 

 Hand thinned 



10 20 30 40 50 60 70 80 90 100+ 

 Distance between seedlings (mm) 



15 



