Researchers studied how to grow potatoes efficiently in sandy areas of northern China by optimizing water and fertilizer use. They tested different irrigation frequencies, water amounts, and fertilizer rates in field experiments. Using a method called TOPSIS, they found the best combination of these factors for growing potatoes effectively. Results showed that changing how often you water and fertilize can impact the growth, yield, and quality of potatoes. More water and fertilizer doesn't always mean better results. The highest potato yield and quality were seen with a specific amount of water and fertilizer. Increase in yield and efficiency sometimes means using less water or more fertilizer strategically. Balancing these factors is key to maximizing potato production in sandy areas.