ISHS Acta Horticulturae 370: International Symposium on Tropical Fruits
EFFECT OF CULTURAL PRACTICES ON MACADAMIA NUT QUALITY |
| Author: | T. Trochoulias |
| Abstract:
Macadamia nut quality is related to the content and composition of oil formed in the kernel. Commercially quality is assessed by kernel recovery (total weight of kernel expressed as a percentage of the total nut in shell weight). In Australia first grade kernel (the percentage by weight of kernels that float in tap water) is assessed by most factories that receive nuts from growers. Irrigation is required in dry climates but can reduce quality in high rainfall areas. Nutrient imbalances can adversely affect quality. Lack of pest and disease control can dramatically increase the percentage of reject kernel. Large quantities of organic matter can improve fibrous root development but reduce quality of fallen nuts. Overcrowded and severely pruned trees produce inferior quality nuts while cross pollination improves quality. The scion affects quality while the rootstock influences vigour. | |
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