Sorting Blueberries for Quality by Vibration1
| Autor: | D. D. Hamann, L. J. Kushman, W. E. Ballinger |
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| Rok vydání: | 1973 |
| Předmět: | |
| Zdroj: | Journal of the American Society for Horticultural Science. 98:572-576 |
| ISSN: | 2327-9788 0003-1062 |
| Popis: | A method is described and test results reported for sorting blueberries with low-frequency vibration. Separation was dependent on fruit firmness which is affected by roughness of handling and other softening factors. Firmness, as measured by compressing blueberries 0.2 cm between flat plates, statistically explained 58 to 72% of the variation in frequency for removal of berries from a vibrating trough with constant energy input. When comparing ripeness with frequency for sorting, light transmittance (∆OD; 740-800 nm) values, which indicate anthocyanin pigment concentration, explained only 10% of the variation in sorting frequency. Berries of several cultivars and harvest dates were vibration sorted and tested for susceptibility to decay. Sorting frequency statistically explained 75% of the variation in decay level. Thus, the vibration method should be suitable for sorting blueberries into groups of different shelf life. |
| Databáze: | OpenAIRE |
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