Abstract

This study was carried out to evaluate the effect of four levels of irrigation (i.e., 100%, 75%, 50% and 25 % of tree water requirement) on some quantity and quality parameters of olive trees (Olea Europaea L. cv. Koronaiki). Drip irrigation system with loop layout was used to irrigate. Results indicated that water stress decreased initial and final fruit set significantly, but effects of water stress regimes in final fruit set was significant mean. The fruit oil content and water use efficiency were increased under the irrigation level of 75%. Irrigation level of 75% was decreased 29 % water use in this cultivar.