The study looked at how different amounts of nitrogen, phosphorus, and potassium fertilizers affect potato yield. They found that using 300 kg of nitrogen, 150 kg of phosphorus, and 150 kg of potassium per hectare resulted in the highest potato yield. This combination gave a tuber yield of 51,669 kg per hectare. The researchers also developed a fertilization equation to help farmers achieve the best economic benefit and highest tuber yield.