ABSTRACT
     The study was carried out during the two successive seasons of 2013/14 and 2014/15 at the farm of environmental studies and research institute – Sadat City University  Menofiya Governorate, Egypt to study the the effect  of nano  particles  of  chitosan and chitosan with 15% nano nitrogen on growth , yield, quality of faba bean.
    Significant differences were found among all treatments and control, where application of recommended dose of normal nitrogen surpassed control and all other treatments and produced the maximum values of plant height, number of leaves and branches , plant fresh weight and plant  dry weight
     The same trend was found concerning seed yield and its attributes , where application of recommended dose of normal nitrogen produced the maximum values of all characters ie number of pods /plant, number of seeds/pod , seed index , total weight of plant , pod weight of plant , seed yield /plant and per feddan and strow yield per plant and per feddan  with significant differences with control and other chitosan 15% nano nitrogen
      It is worthy to note that application of chitosan with 15% nano nitrogen caused increasing in all these traits reached to be near to the values of normal fertilization .
     Concerning the chemical composition of faba bean leaves and seeds , control recorded the lowest values of  NPK composition . while fertilization with normal nitrogen with recommended dose recorded the greatest vales . Gradually increases were found doe to increasing nano nitrogen up to 1.5 g / L which achieved the second rank of most values of characters .