The study looked at how different amounts of potassium fertilizer affect potato growth in a dry, high-altitude mountain area. By testing different levels of potassium fertilizer on potato plants, researchers found that applying potassium increased potato yield and quality. The best results were seen with 120 kg/hm2 of potassium fertilizer, which led to the highest yield and economic benefit. Too much potassium, however, could decrease potato yield. The study suggests that applying around 135 kg/hm2 of potassium fertilizer is optimal for maximizing potato yield in arid mountain regions.