| Treatment |
| Seed Yield (kg∙ha−1) | ||||
| No. | S Source/Time/Method |
| 2011 | 2012 | 2013 | Mean |
| 1 | Control (No S Fertilizer) |
| 2021 | 1361 | 2759 | 2127 |
| 2 | RRES Broadcast Autumn |
| 2836 | 1860 | 3872 | 2856 |
| 3 | RRES Broadcast Spring Pre-Till |
| 2451 | 1666 | 4028 | 2715 |
| 4 | RRES Broadcast Spring Pre-Emergence |
| 2692 | 1929 | 4100 | 2907 |
| 5 | RRES Spring Sideband |
| 2521 | 1586 | 3854 | 2666 |
| 6 | RRES Spring Seedrow-Placed |
| 2472 | 1592 | 3846 | 2637 |
| 7 | Potassium Sulphate Broadcast Autumn |
| 2858 | 1829 | 3980 | 2889 |
| 8 | Potassium Sulphate Broadcast Spring Pre-Till |
| 2985 | 1952 | 4215 | 3051 |
| 9 | Potassium Sulphate Broadcast Spring Pre-Emergence |
| 2939 | 1907 | 3933 | 2926 |
| 10 | Potassium Sulphate Spring Sideband |
| 2830 | 1948 | 4097 | 2958 |
| 11 | Potassium Sulphate Spring Seedrow-Placed |
| 2993 | 1661 | 4013 | 2889 |
|
| LSD0.05 |
| 425 | 228 | 337 | 207 |
|
| |
| 146.8** | 78.9*** | 116.6*** | 71.6**** |