| Treatments | Mean | Std. Error | Pr (>|t|) |
| Year | 7.41 | 3.598e−02 | 0.9979 |
| Tillage | 7.40 | 3.598e−02 | 0.9184 |
| N rates | 7.42 | 1.803e−04 | 0.0392* |
| Soil depth | 7.52 | 2.203e−02 | 1.89e−06* |
| CRM Control | 7.40 | 5.088e−02 | 0.7066 |
| CRM Removed | 7.33 | 5.088e−02 | 0.0956 |
| CRM 2.5 cm | 7.43 | 5.088e−02 | 0.2002 |
| CRM 7.5 cm | 7.48 | 5.088e−02 | 0.2002 |