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Crop yield response to water - Cra

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Lead AuthorSteven R. Evett(USDA-ARS, Conservation &Production Research Labora<strong>to</strong>ry,Bushland, Texas, USA)Contributing AuthorsR. Louis Baumhardt, Terry A. Howell(USDA-ARS, Conservation & ProductionResearch Labora<strong>to</strong>ry, Bushland,Texas, USA)Nazar M. Ibragimov(CRI, Tashkent, Uzbekistan)Douglas J. Hunsaker(USDA-ARS, Conservation & ProductionResearch Labora<strong>to</strong>ry, Maricopa,Arizona, USA)AcknowledgmentsWe gratefully acknowledge supportfrom IAEA Research Contract no.11186/FAO, and from the USDA-ARSOgallala Aquifer Program, a consortiumbetween USDA-ARS, Kansas StateUniversity, Texas AgriLife Research,Texas AgriLife Extension Service, TexasTech University, and West Texas A&MUniversity. Theodore C. Hsiao (Universityof California, Davis, USA) providedvaluable assistance.Scientists contributingwith experimental data andtests for the calibration ofAqua<strong>Crop</strong>Marie-Therese Abi Saab(formerly CIHEAM-IAMB, Bari, Italy;currently LARI, Fanar, Lebanon),Steven R. Evett, Terry A. Howell(USDA-ARS, Conservation & ProductionResearch Labora<strong>to</strong>ry, Bushland,Texas, USA),Hamid J. Farahani(formerly ICARDA, Aleppo, Syria;currently Clemson University, Clemson,South Carolina, USA),Margarita García-Vila(University of Cordoba, Spain),Theodore C. Hsiao(University of California, Davis, USA),Riza Kanber, Mustapha Ünlu(University of Çukurova, Adana, Turkey),Fadi Karam(formerly LARI, Tal Amara, Lebanon;currently ICARDA, Aleppo, Syria),Francisco Orgaz(IAS-CSIC, Cordoba, Spain),Theib Y. Oweis(ICARDA, Aleppo, Syria),Eline Vanuytrecht(KU Leuven University, Leuven, Belgium)Cot<strong>to</strong>nGeneral descriptionCot<strong>to</strong>n is a woody, perennial, indeterminate plant with the C 3pho<strong>to</strong>synthesis pathway grown in warm and some temperateclimates for fibre, but also for its seeds high in oil and proteincontent. Of the four cultivated species of cot<strong>to</strong>n, the dominant onein production is Gossypium hirsutum, also known as Upland cot<strong>to</strong>n,which is managed as an annual. Long staple (Pima) cot<strong>to</strong>n (Gossypiumbarbadense) is also produced, but it accounts for

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