| Cultivar | Experiment 2 | Experiment 3 |
| spikes plant−1 | ||
| Shelly | 25.9a1 | 23.1bc |
| ND VitPro | 25.9a | 26.6a |
| Lang-MN | 23.4ab | 23.5bc |
| Prevail | 23.4ab | 26.4ab |
| Surpass | 21.3bc | 22.0cd |
| LCS Anchor | 21.0bc | 21.8cd |
| Linkert | 19.5c | 22.2cd |
| SY Valda | 19.5c | 20.5cd |
| TCG Wildfire | 18.9c | 19.7d |
| Mean | 22.1 | 22.9 |
| CV | 11.4 | 21.5 |