A test stand for measuring dynamic damages of root crops was proposed. A method for measuring damages of root crop samples was developed for the proposed laboratory model. The test stand was verified in a series of experiments involving potatoes cv. Asterix. The results of preliminary investigates of effect of storage time on average flexural and shear strength of potatoes were presented. A knowledge of flexural and shear strength values and changes in those parameters during storage is required to optimize technological processes in the food processing industry, including the production of potato fries and chips or frozen vegetables.

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