The field work was carried out at Baloza Research Station of the Desert Research Center, North Sinai Governorate, during the two consecutive winter seasons of 2015/2016 and 2016/2017. The experiments were conducted to study the effect of N fertilizer levels as soil addition (0, 50, 75, 100 kg/N/fed); chitosan nanoparticles and N loaded on chitosan nanoparticles treatments as foliar application [Ch, 0.25 (ChN1) and 0.5 (ChN2) mol/L] on growth, yield, chemical composition and storage potential of garlic plants, Chinese cv. grown in sandy soil conditions. Results revealed that N addition at the rate of 100 kg (N/fed) followed by 75 kg (N/fed), were superior significantly in growth, yield, chemical composition and storage potentialparameters in both growing seasons, when compared with control treatment. N loaded onchitosan nanoparticles spray at the rate of 0.5 mol/l followed by 0.25 mol/l gave significant increase in all growth, yield, chemical composition and storage characters potential in both growing seasons,when compared to control treatments. At the harvest date, the highest values of investment ratio were obtained with N loaded on chitosan nanoparticles spray at the rate of 0.5 mol/l and N level at the rate of 100 kg N/fed in the first season, and with N level at the rate of 75 kg N/fed in the second season. The same trend of results was obtained with the end of storage period in both seasons.  Linear correlation and regression of garlic traits were carried out. It may be worth to mention that with each increase of one gram of plant weight, total yield (ton/fed) of garlic correspondingly increased by 0.069 and 0.074 ton in the first and second seasons, respectively, and with each increase of one of percent of dry matter of garlic bulb, percent loss in weight of garlic correspondingly decreased 1.477 and 1.246 in the first and second seasons, respectively.