| Time | Potato peels | |||||
| Solanum tuberosum (Irish) | Ipomoea batatas (Sweet) | |||||
| Bacteria (cfu/ml) | Fungi (sfu/ml) | Yeast (sfu/ml) | Bacteria (cfu/ml) | Fungi (sfu/ml) | Yeast (sfu/ml) | |
| 24 hours | 9.0 × 105 | 1.5 × 106 | 1.6 × 106 | 2.0 × 106 | 3.0 × 106 | 1.2 × 106 |
| 48 hours | 2.4 × 106 | 3.2 × 106 | 2.0 × 106 | 4.8 × 106 | 4.5 × 106 | 1.7 × 106 |
| 72 hours | 7.2 × 106 | 6.0 × 106 | ND | 8.6 × 106 | 7.4 × 106 | ND |
| 96 hours | 5.6 × 106 | 4.3 × 106 | ND | 5.3 × 106 | 5.5 × 106 | ND |