This research was conducted during the months of January to September 2015 in the farm Don José, located in Santo Domingo, Laredo district, Trujillo province, La Libertad region; Located 336 meters above sea level, with a temperate, dry and pleasant climate, with temperatures ranging between 16 ° C and 26 ° C with sunny days and cold nights by lowering temperature; rainfall is low throughout the year, except for the months when the entire northern coast of Peru rainfall presented by “El Niño” or when rains are excessive in winter time in the mountains, gets low to moderate precipitation intensity; in loamy sand soil texture, moderately saline and low in organic matter. The study aimed to evaluate the effect of three levels of NPK fertilization; and to determine the best dose of NPK fertilizer to obtain the highest performance and quality of Allium cepa L. Var. Sivan F1-H-202 in S...