| Tuber Color | Tuber Texture | Tuber Cross-section |
| 1. purple | 1. partial russet | 1. very flat |
| 2. red | 2. heavy russet | 2. -- |
| 3. pink | 3. moderate russet | 3. flat |
| 4. dark brown | 4. light russet | 4. -- |
| 5. brown | 5. netted | 5. intermediate/oval |
| 6. tan/light brown | 6. slight net | 6. -- |
| 7. buff | 7. moderately smooth | 7. mostly round |
| 8. white | 8. smooth | 8. -- |
| 9. cream | 9. very smooth | 9. very round |
| ______________ | ______________ | ______________ |
| Tuber Skin Set | Tuber Shape | Tuber Eye Depth |
| 1. very poor | 1. very round | 1. -- |
| 2. -- | 2. mostly round | 2. deep |
| 3. poor | 3. round to oblong | 3. + |
| 4. -- | 4. mostly oblong | 4. -- |
| 5. fair | 5. oblong | 5. medium |
| 6 -- | 6. oblong to long | 6. + |
| 7. good | 7. mostly long | 7. -- |
| 8. -- | 8. long | 8. shallow |
| 9. excellent | 9. cylindrical | 9. + |
| ______________ | ______________ | ______________ |
| Tuber Size(GCY Scale) | Tuber Appearance | Tuber Disease Rating |
| 1. small | 1. very poor | 1. very severe |
| 2. -- | 2. -- | 2. -- |
| 3. small-medium | 3. poor | 3. severe |
| 4. -- | 4. -- | 4. -- |
| 5. medium | 5. fair | 5. moderate |
| 6. -- | 6. -- | 6. borderline |
| 7. medium-large | 7. good | 7. slight |
| 8. -- | 8. -- | 8. very slight |
| 9. large | 9. excellent | 9. none |
| ______________ | ______________ | ______________ |
| Plant Disease and Plant Type | Pollution Reaction | Maturity |
| 1. decumbent-poor canopy | 1. Dead | 1. -- |
| 2. decumbent-fair canopy | 2. -- | 2. early |
| 3. decumbent-good canopy | 3. severe | 3. + |
| 4. spreading-poor canopy | 4. + | 4. -- |
| 5. spreading-fair canopy | 5. moderate | 5. medium |
| 6. spreading-good canopy | 6. + | 6. + |
| 7. upright-poor canopy | 7. -- | 7. -- |
| 8. upright-fair canopy | 8. slight | 8. late |
| 9. upright-good canopy | 9. none | 9. + |