b'Figure 1a. Physiological tuber growth cracks. Figure 1b. Physiological severe growth cracks. Figure 2. Thumbnail cracks. Figure 3. Physiological lengthwise growth crack.Figure 4. Herbicide induced growth cracking. Figure 5. Growth crack from herbicide injury. Figure 6. Elephant hide-like cracking from herbi- Figure 7. Thumbnail crack with bacterial soft rot. cide injury.NOVEMBER/DECEMBER 2020 POTATO GROWER 13'