Encyclopedia says that the foods that can't be eaten with white radish are ginseng, American ginseng, citrus, carrot, snake meat, rehmannia root and Polygonum multiflorum, so it won't do any harm to stew white radish and potatoes together.
Rugao County Records compiled during the reign of Emperor Qianlong of Qing Dynasty (AD 1750) recorded: "Radish, a kind of radish, has two kinds of red and white, which can be planted in all seasons. Only the last one is good at the beginning, and armor can be eaten as food. The soil in Changsha is sweet and crisp, and the soil in Changsha is hard and spicy. Has the effects of lowering qi, promoting digestion, eliminating diseases, moistening lung, removing toxic substances, promoting fluid production, and promoting diuresis to relieve constipation.