Growth, Yield and Biochemical Responses in Barley to DAP and Chitosan Application under Water Stress oleh Abdel Rahman M Tawaha, Nusrat Jahan, Nidal odat, Ezz Al-Dein Al-Ramamneh, Abdel Razzaq Al- Tawaha, Yousef Abu-Zaitoon, Mohammad Alhawatema, Amanullah Amanullah, Abdur Rauf Abdur Rauf, Mohammad Wedyan