Sloan, John P. 1992. Effects of seeder design and seed placement on seedling size and 

 cull rates at western forest nurseries. Res. Pap. INT-458. Ogden, UT: U.S. Department 

 of Agriculture, Forest Service, Intermountain Research Station. 24 p. 



Nursery plots sown with the Summit Precision Seeder and the Oyjord Seeder were 

 compared with plots oversown and hand thinned to desired spacings. We studied 26 

 seedlots of nine conifer species at five Forest Service, U.S. Department of Agriculture, 

 nurseries. Results varied with nursery, species, and seed characteristics. Thinned plots 

 produced less clumping and fewer gaps between seedlings, but showed little or no 

 difference in seedling size, nor in the number of acceptable seedlings. 



KEYWORDS: conifers, spacing, seed sower, seeding morphology 



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