| Growing Season Duration | ||||||||
| Jointed goatgrass population | Long | Short | Long | Short | ||||
| Experiment 1 | Root length (cm) | Shoot length (cm) | ||||||
| A-R | 4.9 | b | 3.3 | c | 6.2 | b | 4.7 | c |
| B-W | 6.4 | a | 3.8 | c | 7.5 | a | 5.3 | c |
| C-S | 4.9 | b | 2.8 | d | 5.4 | c | 4.9 | c |
| Tukey’s HSD(0.05) for all pairwise comparisons | ||||||||
| Experiment 2 | ||||||||
| A-R | 5.6 | a | 3.5 | b | 6.9 | ab | 5.0 | bb |
| B-W | 5.9 | a | 3.8 | b | 7.1 | ab | 4.6 | bb |
| C-S | 6.1 | a | 3.2 | b | 7.4 | aa | 5.9 | ba |
| LSD0.05 = 0.26 | LSD0.05(dur) = 0.32 | |||||||
| LSD0.05(popln) = 0.39 | ||||||||