This research was carried out during both growing seasons 2009/10 - 2010/11 at the National Center for Agricultural Research and Extension (NCARE) / Karak Governorate / Jordan, to study the response of five barley varieties namely Mu'tah, Yarmok, Athroh, Rum and Acsad-176 to the effect of four seeding rates (50, 100, 150 and 200kg/ha) and five nitrogen fertilizer levels (0, 15, 30, 45 and 60kg/ha) on the productivity of grain and straw, the harvest index and some phenological indicators.