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@article{Salim_Hamza_Jar_2018, title={Irrigation scheduling and water requirements for cowpea using evaporation pan at middle of Iraq}, volume={4}, url={https://www.updatepublishing.com/journal/index.php/jaa/article/view/3445}, DOI={10.25081/jaa.2018.v4.3445}, abstractNote={<p>The present study was conducted to find out the water requirements and most suitable irrigation frequencies for cowpea (<em>Vigna</em> <em>unguiculata</em> L.) var grown under drip irrigation. The treatments were based on the IW:CPE ratio at different empirical pan factors 0.6 , 0.8, 1.0, 1.,1.4 , and 1.6 Ef (where Ef = IW/CPE). It was observed that the irrigation interval was variable values decreased by increasing Ef value and with the progress of the growing season. The 1.2 and 1.0 IW: CPE treatments with approximately 4 days irrigation interval were achieved the best results. The total amount of applied water during Cowpea growing season was varied between 247.7 and 266.5mm with 254.8mm as a mean. Irrigation treatment with Ef1.2 was superior over the rest of other treatments in fresh seed yield (5.13 ton.hec.<sup>-1</sup>), crop water productivity (2.14 kg.m<sup>-3</sup>), biological yield (6.88 ton.hec.<sup>-1</sup>) , fresh pod yield (7.33 ton.hec.<sup>-1</sup>), weight of 100 seed (31.28gm), number of seed/pod (9.34) and netting percentage (37.1). The lowest values of the most parameters used in this study were obtained by Ef 0.6 irrigation treatment.</p> <p>&nbsp;</p>}, journal={Journal of Aridland Agriculture}, author={Salim, Saifuldeen A. and Hamza, Isam Kudhier and Jar, Laith Farhan}, year={2018}, month={Jun.}, pages={13–17} }