Species | Digging season | Treatment | |
---|---|---|---|
Control | IBA (3000 ppm) | ||
Red oak | fall | 3.9 | 12.8** |
Sugar maple | fall1 | 5.4 | 13.0** |
spring | 12.7* | 15.9 | |
Green ash | fall | 8.8 | 7.9 |
spring | 3.1* | 3.2* | |
European birch | spring | 6.2 | 5.6 |
Littleleaf linden | spring | 7.5 | 10.7 |
↵1 Fall dug trees were held in cold storage until spring. Mean separation by t-test; * .05 level, ** .01 level.