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Quality changes in macadamia kernel between harvest and farm-gate
Journal article   Peer reviewed

Quality changes in macadamia kernel between harvest and farm-gate

David Walton and Helen M Wallace
Journal of the Science of Food and Agriculture, Vol.91(3), pp.480-484
2011
url
https://doi.org/10.1002/jsfa.4209View
Published Version

Abstract

macadamia kernel quality postharvest handling drying storage
BACKGROUND:Macadamia integrifolia, Macadamia tetraphylla and their hybrids are cultivated for their edible kernels. After harvest, nuts-in-shell are partially dried on-farm and sorted to eliminate poor-quality kernels before consignment to a processor. During these operations, kernel quality may be lost. In this study, macadamia nuts-in-shell were sampled at five points of an on-farm postharvest handling chain from dehusking to the final storage silo to assess quality loss prior to consignment. Shoulder damage, weight of pieces and unsound kernel were assessed for raw kernels, and colour, mottled colour and surface damage for roasted kernels. RESULTS: Shoulder damage, weight of pieces and unsound kernel for raw kernels increased significantly between the dehusker and the final silo. Roasted kernels displayed a significant increase in dark colour, mottled colour and surface damage during on-farm handling. CONCLUSION: Significant loss of macadamia kernel quality occurred on a commercial farm during sorting and storage of nuts-in-shell before nuts were consigned to a processor. Nuts-in-shell should be dried as quickly as possible and on-farm handling minimised to maintain optimum kernel quality.

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Agriculture, Multidisciplinary
Chemistry, Applied
Food Science & Technology

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