Abstract: In order to evaluate yield and some morphological characteristics of 10 spring barley verities under non limited and limited irrigation (irrigation until flowering) an experiment as two design based on Randomized Complete Block (RCB) with there replications were carried out. All varieties had no difference in the number of kernel per spike and flag leaf area two irrigation regimens. The irrigation treatments affected all measured traits except awn length, spike length and no of kernel per spike of main stem. The genotypes and irrigation treatment interaction had significant effects on grain yield and growing period. In non limited irrigation treatment Atlas 76/Kavir and Gorgan/CM67/Pro/Suo varieties had higher grain yield than other varieties, whereas, Suifu/Walfajre, Rihane/Alger-union, Atlas 46/Kavir and Gorgan/CM67/Pro/Suo produced highest yield. There varieties had greater STI (Stress Tolerance Index) compared to other varieties and showed more resistance to drought stress at flowering-grain filling period.