Field experiments were conducted in summer 2004 and 2006 in the Hail region of Saudi Arabia using a complete randomized block design with 6 levels (0, 600, 700, 800, 900, and 1000 kg of 11-29-19/ha) and 4 replications. Addition of 800 kg/ha of 11-29-19 or more increased fresh tuber yield significantly (p < 0.05) in both years. Leaf N and P concentrations at 45 days after emergence were increased with increasing levels of 11-29-19 in the first season, but no significant difference was detected in the second season. Leaf K concentration was not significantly affected in both seasons. Leaf nutrient concentrations were at or above optimum levels for high yield. Results of this study indicated that soil application rates of 700-900 kg/ha at pre-planting besides natural soil and irrigation water K were sufficient to produce economical potato yield.