| Source of variability | Glucose | Fructose | Sucrose | Raffinose | Stachyose |
| Year (Y) | ** | * | *** | * | *** |
| Treatment (T) | ** | * | *** | * | ** |
| Cultivar (Cv) | * | * | * | * | * |
| Irrigation (Ir) | ** | * | * | * | ** |
| Y × T | ** | * | ** | * | * |
| Y × Cv | NS | * | ** | NS | * |
| Y × Ir | * | * | ** | ** | * |
| T × Cv | * | * | * | NS | * |
| T × Ir | ** | NS | ** | NS | NS |
| Cv × Ir | * | * | * | * | * |
| Y × T × Cv | ** | ** | ** | * | * |
| Y × T × Ir | * | NS | ** | NS | NS |
| T × Cv × Ir | * | * | * | * | * |
| Y × Cv × Ir | * | * | * | * | * |
| Y × T × Cv × Ir | * | * | * | * | * |