ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Performance of perforated-belt sizers as affected by size standards for fresh market tomatoes.

Sargent, S.A., Brecht, J.K., Talbot, M.T. and Zoelner, J.J.

Applied Engineering in Agriculture. Volume 7, Number 6, Nov 1991. Pages 724-728.

1991

บทคัดย่อ

Three sizes of mature-green tomatoes were sampled after commercial packing at 14 Florida packinghouses. Dimensional measurements were made on individual tomatoes along defined x, y, and z axes. The fruit were then reclassified according to three size standards, the current Florida size standard [which allows a 2 mm (0.078 in.) overlap between size categories] and two hypothetical size standards [allowing a 1 mm (0.039 in.) overlap between sizes and no overlap between sizes]. With a grade tolerance allowing 10% fruit out-of-size, two cultivars ("Duke" and "FTE-12") could be sized with no overlap and remain in grade using perforated belts with current dimensions. A third cultivar ("Sunny") was out of grade only for size 6X7, the smallest size. With decreasing size, fruit length approached the maximum equatorial diameter (tomato shape became less oblate and more spherical), resulting in a higher percentage of tomatoes being sized incorrectly.