Cutter performance is determined by regularly calculating the average cut seed size and seed size distribution. At the very least, these calculations should be performed each time a new seed lot is cut. Mother tuber size, which varies with each seed lot, affects the performance of the cutter. During cutting, samples of seed pieces should be collected and individually weighed. The average size is calculated by dividing the weight by the number of seed pieces. For example, a 12.5 lb (5.4 kg) sample with 97 pieces has an average weight of just over 2 oz (60 g). The average seed size is not a good measurement of seed cutter adjustment. The average seed size may be ideal (2 oz (60 g)), but a majority of the cut seed sizes might occur outside the ideal seed size range of 1.5 to 3 oz (35-85 g). See the graph for Large Mother Tubers shown in Figure 3.2-2. Seed size distribution is the best measurement of the cutter performance. This is determined by individually weighing and arranging the seed pieces into size groups such as less than 1.5 oz (35 g), 1.5 to 3 oz (35-85 g), and greater than 3 oz (80 g) (Table 3.2-1 & Figure 3.2-4). Pieces