Abstract
SUMMARYThe weight, length, breadth and depth were measured for each of 10 000 potato tubers. These were samples over 3 years of the 10 most commonly grown UK maincrop varieties. Volume, square‐mesh riddle size and average projected area were also measured in the final 2 years. A multivariate log‐normal distribution was found to give a good fit to the data. Illustrations are presented of how this distribution can be used to assess grading schemes.
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