| System | Mulching rate (t/ ha) | Harvested tubers number (1000/ha) | Total number of harvested tubers (1000/ha) | ||||
| Marketable | Non-marketable | ||||||
| Till | 0 | 33 | c | 466 | a | 500 | a |
| No-Till | 25 | 68 | b | 390 | ab | 458 | a |
| No-Till | 50 | 95 | b | 391 | ab | 486 | a |
| No-Till | 75 | 123 | a | 290 | b | 412 | a |