APPENDIX: STUDIES THAT HAVE COMPARED FIELD PERFORMANCE OF 

 BAREROOT AND CONTAINERIZED SEEDLINGS IN THE UNITED STATES AND 

 CANADA 



Study 



Species 



Type of 

 container 



Time 

 since 

 field 

 planting 



Survival 



Results 



Bareroot Container 



Aim (1983) 



Anderson and 

 others (1984) 



Arnott (1974) 



Black spruce (Picea 

 mariana [Mill.] B.S.P. 



White spruce {Picea 

 glauca [Moench] Voss) 



Douglas-fir (Pseudotsuga 

 menziesii [Mirb.] Franco) 



Western hemlock (Tsuga 

 heterophylla [Raf.] Sarg.) 



Lodgepole pine (Pinus 

 contorta Dougl.) 



White spruce 



Engelmann spruce 

 (Picea engelmannii 

 Parry) 



Styroblocks 

 Paperpots 

 Styroblocks 

 Paperpots 



Loblolly pine (Pinus Ray Leach 



raeda L.) and slash pine seedling 

 (Pinus elliottii Engelm.) containers 



Bullets 



Bullet plugs 



Styroblocks 



Bullets 

 Bullet plugs 



Bullets 



Bullet plugs 

 Styroblocks 

 Bullets 

 Bullet plugs 

 Styroblocks 



Styroblocks 



Years 

 4 



1V 2 



3-5 



3-5 



1-2 



5 

 2 

 5 

 5 

 2 



Containerized stock 

 survived and grew better 

 than 3-0 bareroot stock. 



Containerized stock 

 survived and grew better 

 than 3-0 bareroot stock. 



Containerized stock 

 survived and grew better 

 than 3-0 bareroot stock. 

 Containerized stock 

 survived and grew better 

 than 3-0 bareroot stock. 

 Containerized plugs 

 performed better than 

 bareroot stock grown in 

 trays and planted in the 

 summertime. 

 Little difference between 

 bareroot and container- 

 ized stock growth rates. 

 Little difference between 

 bareroot and container- 

 ized stock growth rates. 



Containerized out- 

 performed bareroot in 

 fall and summer plant- 

 ings but bareroot per- 

 formed as well or better 

 than container in other 

 spring and fall plantings. 



Containerized stock 

 showed superior survival 

 while growth rates were 

 comparable. 

 Containerized stock 

 showed superior survival 

 while growth rates were 

 comparable. 

 Little difference in 

 performance of summer- 

 time planting. 

 Containerized stock 

 performed best. 

 Containerized stock 

 performed best. 



Little difference in 

 performance. 

 Containerized stock 

 performed best. 

 Containerized stock 

 showed superior survival 

 and height growth. 

 Containerized stock 

 showed superior 

 survival. 



- - - - Percent 

 82,83 94,98 



82,83 



72.86 



72.86 



64 

 64 



82 



82 



35 

 35 



81-83 



83 

 44,71 

 62 

 62 

 53 



86.92 



94,99 



97,100 



94 



85 

 86 



58 



68 



4-100 28-95 



49 

 59 



81-88 



95 

 75,77 

 65 

 87 

 92 



69,64 

 (con. 



10 



