ABSTRACTRusset Burbank and Kennebec potato cultivars were irradiated with dosages of 0.1 and 1.0 KGy and stored in polyethylene or paper bags for 1 or 3 mo at 5°C or 20°C. Tubers receiving irradiation showed a significant (p<0.01) increase in nitrate‐nitrogen concentration as compared to controls. Those receiving the 1.0 KGy dose had the highest nitrate‐nitrogen concentration. Tubers stored in polyethylene bags were significantly (p<0.01) higher in nitrate‐nitrogen concentration than those stored in paper bags. Tubers stored at 20°C were significantly (p<0.01) higher in nitrate‐nitrogen than those stored at 5°C. These trends were consistent for both cultivars. The cortex region was significantly (p<0.01) higher in nitrate‐nitrogen concentration than the pith region. Kennebec tubers were significantly (p<0.01) higher in nitrate‐nitrogen than the Russet Burbank tubers for all irradiation doses and stora
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