U. A., Essien,, Department of Agricultural Economics, Federal University of Technology Owerri, Imo State, Nigeria.
Uckun, Ayca Akca, Republic of Turkey Ministry of Agriculture and Forestry, Olive Research Institute, Cultivation Techniques, Bornova, İzmir, Turkey.
Ugucioni, Julio Cesar , Department of Physics, Federal University of Lavras, Lavras, Minas Gerais, Brazil.
Umoh , Enobong Okon , Department of Agricultural Engineering, Akwa Ibom State University, Ikot Akpaden, Uyo, Nigeria.
Uwakwe, Augustine A, Department of Biochemistry, Faculty of Science, University of Port Harcourt, Nigeria.

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