TABLE 1.
Main environmental characteristics for each location.
| Characteristic | ACRE_2017 | ACRE_2018 | RMN_2018 |
| Soil type | Raub–Brenton complex | Chalmers silty clay loam | Drummer |
| Field capacity % by weight | 28.5 | 27.6 | 25.9 |
| Permanent wilting point % by weight | 13.3 | 12.4 | 12.4 |
| Bulk specific density, g cm–3 | 1.3 | 1.4 | 1.4 |
| Cumulative rainfall mm | 487.7 | 458.2 | 346.5 |
| Average rainfall, mm month–1 | 132.0 | 130.0 | 91.0 |
| Cumulative solar radiation, MJ m–2 | 2,038.6 | 1,899.1 | 2,128.5 |
| Mean air temperature, °C | 21.4 | 23.4 | 23.5 |
| Maximum air temperature, °C | 28.2 | 29.6 | 29.4 |
| Minimum air temperature, °C | 15.1 | 17.5 | 18.0 |
| Cumulative growth degree days | 1,270.6 | 1,431.9 | 1,452.0 |
| Reference evapotranspiration, mm/day | 2.4 | 2.3 | 2.5 |
| Days to emergence | 9 | 7 | 9 |