Two field experiments were conducted at the Experiment and Research Center, Fac. Agric., Moshtohor, Benha Univ., during 2018 and 2019 summer seasons. The aim of this was to study response of three yellow maize hybrids (SC 2055, SC 176 and SC P3737) to three N fertilizer rates (60,  90 and 120 kg N fed^-1) and two Nano-N foliar applications (Without and Nano foliar applications). The experimental design was randomized complete block design (RCBD) using split split-plots arrangement with three replications. The yellow maize hybrids, N fertilizer levels and Nano-N foliar applications were arranged at random in the main plots, sub- plots and sub sub-plots, respectively. Single Cross P3737 was significantly earlier than the other hybrids regarding 50% tasseling and silking. Also, SC P3737 was superior to the other two hybrids in most of the studied traits. The highest values of plant height, ear length, ear diameter, No. grains row^-1, ear weight, ear grains weight, 100-grain weight, Forge yield fed^-1 and grain yield fed^-1 were obtained with fertilizer level of 120 N fed^-1. On the other hand, the earliest tasseling and silking were recorded with 60 kg N fed^-1. Nano foliar application gave the greatest of all grain yield and attributes of yellow maize hybrids as compared with untreated. It could be concluded that under the conditions of the experiment, planting SC P3737 under 90 or 120 N fed^-1 and nano foliar application is recommended.