Table 1 — Actual and target seed densities for the Summit and Oyjord Seeders using nine tree species at five 

 nurseries 



Seeds per foot of row Percent of target 



Species 



Nursery' 



Summit 



Oyjord 



Target 



Summit 



Oyjord 





Douglas-fir 



OUA 



1 9.8 



18.9 



20.6 



96 



92 







LPN 



14.5 



25.8 



22.9 



63 



113 



** 





JHS 



12.9 



12.8 



17.5 



74 



73 



ns 



Engelmann spruce 



CDA 



10.1 



20.9 



20.6 



79 



101 



** 





LPN 



18.0 



23.3 



21.9 



82 



106 





White spruce 



JWT 



29.4 



22.8 



29.4 



100 



78 



* 



Noble fir 



WRN 



11.7 



24.2 



21.9 



53 



111 



** 



Jack pine 



JWT 



21.9 



14.0 



18.8 



116 



74 





Lodgepole pine 



LPN 



14.4 



18.0 



19.9 



72 



90 



** 



Ponderosa pine 



LPN 



11.6 



18.9 



18.1 



64 



104 







JHS 



11.4 



11.6 



16.2 



70 



72 



ns 



Red pine 



JWT 



20.4 



14.3 



17.9 



114 



80 



** 



Western larch 



CDA 



22.6 



22.0 



20.6 



110 



107 



ns 



^Nursery code: Coeur d'Alene (CDA); J. Herbert Stone (JHS); J. W. Tourney (JWT); Lucky Peak (LPN); and Wind River (WRN). 

 ^* 0.05 significance level; ** 0.01 significance level; ns not statistically different at the 0.05 significance level. 



Five weeks after sowing, emerged seedlings in 

 the oversown plots were hand thinned to the target 

 spacing. The positions of the seedlings were mea- 

 sured on all sample plots using the same method as 

 for mapping seed placement. 



At the end of the first growing season, top height 

 was measured on a sample of seedlings. Five seed- 

 lings in every half-meter sample row were randomly 

 selected in each subplot and measured to the near- 

 est centimeter. Also, seedlings were counted to 

 verify that mortality during the growing season 

 was minimal. 



At three of the nurseries, more measurements 

 were taken at lifting time. Each sample plot was 

 measured separately. All seedlings were graded and 

 counted by an experienced grader. Grading specifi- 

 cations, set by nursery personnel, were unique for 

 each species and nursery. We measured total num- 

 ber of trees lifted, number of trees meeting specifica- 

 tions, and number of nonshippable trees for all 

 sample plots. Also, 10 trees were randomly selected 

 for morphological measurements: top height, stem 

 caliper, top dry weight, and root dry weight. 



RESULTS AND DISCUSSION 



Data summaries and analyses are presented in 

 tables 1 through 6. Some of the tests have mean 

 values that appear to show obvious differences. 



Table 2 — Percentage of target seed densities obtained using 

 the Summit Precision Seeder and the Oyjord 

 Seeder 



Nursery^ 





Percent of target 







Species' 



^ Summit 



Oyjord 



CDA 



DF3 



96 



92 



ns" 





ES 



79 



101 



ns 





WL 



110 



107 



ns 



LPN 



DF3 



63 



113 







ES 



82 



106 



** 





LP 



72 



90 



** 





PR 



64 



104 



** 



JHS 



DF 



74 



73 



ns 





PR 



70 



72 



ns 



JWT 



WS 



100 



78 



* 





JP 



116 



74 







RP 



114 



80 



** 



WRN 



NF 



53 



111 



** 



^Nursery code: Coeur d'Alene (CDA); Lucky Peak (LPN); 

 J. Herbert Stone (JHS); J. W. Tourney (JWT); and Wind River 

 (WRN). 



^Species code: Douglas-fir (DF); Englemann spruce (ES); western 

 larch (WL); lodgepole pine (LP); ponderosa pine (PP); white spruce 

 (WS); jack pine (JP); red pine (RP); and noble fir (NF). 



^Inland variety of Douglas-fir. 



''* 0.05 significance level; ** 0.01 significance level; ns not 

 statistically different at the 0.05 significance level. 



2 



