The study aimed to determine the best irrigation frequency for growing potatoes more effectively and saving water in Inner Mongolia. Researchers tested drip irrigation under mulch at different intervals to see its impact on potato growth. They found that watering every 8 days led to the deepest moist soil layer, which helped the roots grow better. Under this schedule, plants were taller, stored more starch in their tubers, and used water more efficiently compared to watering every 4 or 12 days. The potato yield was highest when watered every 4 days, but the yield of watering every 8 days was close and more water-efficient. Therefore, for growing potatoes in Wuchuan, Inner Mongolia, irrigating every 8 days is recommended for better yields and saving water.