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- Author or Editor: Elizabeth Larmond x
A rapid technique for measuring onion firmness is described. The bulbs were compressed at 15 cm/min, and the time taken for the force applied to change from 400 to 3200 g indicated automatically by electronic apparatus. Since the deformation rate was constant this time was a direct measure of bulb deformation and provided an objective comparison of bulb firmness under controlled test conditions that simulated sensory evaluations. Results showed that the differences between cultivars, the effect of chemical treatments, and storage time can be evaluated. The instrumental results are well related to human evaluations.