| Stems | Aspect ratio (L/D) | |
| Group-1 E1 + E3 + E4 + E6 | Group-2 E2 | |
| Narrow | 13,413.33 ± 454.56 | 10,840.97 ± 412.09 |
| Medium | 12,821.44 ± 450.13 | 8606.27 ± 256.32 |
| Wide | 10,462.2 ± 482.65 | 9289.10 ± 382.59 |