[1] Univ Extremadura, Res Inst Agr Resources INURA, Dept Anim Prod & Food Sci, Avda Adolfo Suarez S-N, Badajoz 06007, Spain
[2] Univ Extremadura, Res Inst Agr Resources INURA, Dept Econ, Avda Adolfo Suarez S-N, Badajoz 06007, Spain
[3] Damanhour Univ, Dept Agr Econ, Abadiyyat Damanhur, Egypt
[4] Univ Extremadura, Res Inst Agr Resources INURA, Badajoz, Spain