A field study was conducted during 2008 and 2009 at El-Khattara farm station, Zagazig Uni-versity, Sharkyia, Egypt (30°36' N, 32°15' E) to determine the effect of three N rates (214, 273, and 333 kg N ha –1), four micronutrients spray treatments (Check, Zn, Mn, and Zn + Mn), and three planting density levels (4.76, 5.71, and 6.66 plant m –2) on growth and grain yield of corn (Zea mays, L). The soil was sandy (Entisols) and groundwater was used for irrigation. Response to N was maximized to 214 kg ha –1 without a significant effect on most growth traits and grain yield. Agronomic efficiency of N use for grain yield was negatively related to N rate (r 2 = 0.49). Application of micronutrients had no ef-fect on most growth and yield characters except a significant increase by 9.5, 8.7, and 9% in plant weight (g plant –1), biomass yield (kg m –2), and N agronomic efficiency for biomass yield, respec-tively. Growth was decreased by increasing plant density without affecting harvest index, agronomic efficiency, biomass yield, and grain yield. The application of Zn to the highest maize plant density increased grain yield by 16% as compared to the check. It is recommended, as predicated by the linear model, that N fertigation rate should be around 220 kg ha –1 with plant density of 6.66 plant m –2 accompanied by Zn application for maximum irrigated corn grain yield in sandy soil. Abbreviations: DAS, days after sowing; LA, leaf area; LAI, leaf area index; RPP, relative photosynthetic potential; HI, har-vest index; BW, plant weight g plant –1 , GYP, grain yield g plant –1 , BYM, biomass yield kg m –2 , GYM, grain yield kg m –2 , NAE, nitrogen agro-nomic efficiency.