Publisher: AGRONOMY; Journal: AGROJNL:Agronomy Journal; Copyright: Will notify... Volume: Will notify...; Issue: Will notify...; Manuscript: aj-2017-08-0123-a; DOI: ; PII: <txtPII> TOC Head: ; Section Head: ; Article Type: ARTICLE This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1002/agj2.20314. This article is protected by copyright. All rights reserved. Page 1 of 24 Rapeseed Core ideas  Irrigation improved rapeseed yield and quality in a semi-arid environment.  Irrigation during the flowering period is suggested with a higher WUE and net income.  Line-Source Sprinkler Irrigation is suggested for field crops at small-medium scaled farms. Supplemental Irrigation Impact on Yield and Yield Quality Parameters of Rapeseed Hüseyin T. Gültaş 1 and Yeşim Ahi 2,* 1 Department of Biosystem Engineering, University of Bilecik Şeyh Edebali, Bilecik, 11230, Turkey. 2 Water Management Institute, Ankara University, 06135, Ankara, Turkey. *Corresponding Author: Yeşim Ahi, Ph.D., Water Management Institute, Ankara University, Ankara, 06135, Turkey, e-mail: ysmahi@ankara.edu.tr Abbreviations: DOY, day of year; ET, evapotranspiration; I, irrigation amount; IWUE, irrigation water use efficiency; WUE, water use efficiency; Y, yield.