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    Cotton yields under different furrow irrigation management techniques in the Southeastern Anatolia Project (GAP) area, Turkey
    (Springer, 2007) Uenlue, Mustafa; Kanber, Riza; Onder, Sermet; Sezen, Metin; Diker, Kenan; Ozekici, Bulent; Oylu, Mustafa
    The continuous flow furrow irrigation (COFFI), surge flow furrow irrigation (SUFFI), cutback flow furrow irrigation (CUFFI), variable alternate flow furrow irrigation (VAFFI), and tail water reuse system furrow (TWRSF) techniques with the same inflow rate of 0.072 m(3) min(-1) were compared in relation to the cotton yield and water use efficiency at a 3-year field study conducted on cotton (Gossypium spp.) in the Southeastern Anatolia Project (GAP) area of Turkey. Yields revealed significant statistical differences between the furrow management techniques (P < 0.05). The maximum yield was obtained from the COFFI treatment (2,630 and 2,920 kg ha(-1)) in the first 2 years, and from SUFFI and CUFFI treatments (3,690 and 3,780 kg ha(-1), respectively) in the last year. There were significant yield reductions, which varied from 10 to 35% in TWRSF and from 11 to 19% in VAFFI treatments although 43 and 28% more water was applied to the TWRSF than to CUFFI and SUFFI treatments, respectively. The average total water use efficiencies (WUEET) varied from 4.14 (VAFFI) to 2.59 (COFFI). The corresponding values were 0.37 and 0.36 kg ha(-1) m(-3) for CUFFI and SUFFI, respectively. The average irrigation water use efficiency (WUEIR) for CUFFI and SUFFI treatments were 0.30 and 0.23 kg ha(-1) m(-3), respectively.