| 2010 and 2011 data sets | 2010 data set only | |||||
| Radiation category with highest biomass fraction | p value | Kruskal-Wallis test statistic | Radiation category with highest biomass fraction | p value | Kruskal- Wallis test statistic | |
| American Beech | - | 0.255 | 2.736 | - | 0.215 | 3.076 |
| Bigtooth Aspen | - | 0.392 | 1.873 | High | 0.059 | 5.649 |
| Pin Cherry | - | 0.802 | 0.443 | - | 0.144 | 3.873 |
| Red Maple | - | 0.164 | 3.613 | Med | 0.022 | 7.616 |
| Striped Maple | - | 0.940 | 0.125 | - | 0.368 | 1.998 |
| Paper Birch | - | 0.806 | 0.432 | - | 0.375 | 1.962 |
| Yellow Birch | - | 0.223 | 2.999 | - | 0.931 | 0.144 |
| Tolerants | - | 0.204 | 3.183 | - | 0.215 | 3.076 |
| Mid-Tolerants | - | 0.146 | 3.846 | - | 0.741 | 0.598 |
| Intolerants | - | 0.860 | 0.302 | - | 0.122 | 4.212 |