Journal of Agricultural Engineering and Technology (JAET), Volume 20 (No. 2) December, 2012 Nigerian Institution of Agricultural Engineers © www.niae.net i JOURNAL OF AGRICULTURAL ENGINEERING AND TECHNOLOGY (JAET) EDITORIAL BOARD Editor-In-Chief Professor A. P. Onwualu, FAS Raw Materials Research and Development Council (RMRDC) 17 Aguiyi Ironsi Street, Maitama District, PMB 232 Garki, Abuja, Nigeria. aponwualu@niae.net ; ponwualu@yahoo.com Phone: 08037432497 Prof. B. Umar – Editor, Power and Machinery Rector, Adamawa State Polytechnic, Yola, Adamawa State, Nigeria. E-mail: bobboiumar@yahoo.co.uk Phone: 08023825894 Prof. A. A. Olufayo – Editor, Soil and Water Engineering Agricultural Engineering Department, Federal University of Technology, Akure, Ondo State, Nigeria. E-mail: ayo_olufayo@yahoo.com Phone: 08034708846 Prof. A. Ajisegiri – Editor, Food Engineering College of Engineering, University of Agriculture, Abeokuta, Ogun State, Nigeria. E-mail: ajisegiri@yahoo.com Phone: 08072766472 Prof. K. Oje – Editor, Processing and Post Harvest Engineering Agric. and Bio-resources Engineering Department, University of Ilorin, Kwara State, Nigeria. E-mail: kayodeoje2@yahoo.com Phone: 08033853895 Dr. A. El-Okene - Editor, Structures and Environmental Control Engineering Agricultural Engineering Department, Ahmadu Bello University, Zaria, Kaduna State, Nigeria. E-mail: abdullahielokene@yahoo.com Phone: 08023633464 Prof. D. S. Zibokere – Editor, Environmental Engineering Agric. and Environmental Engineering Dept., Niger Delta University, Wilberforce Island, Yenegoa. E-mail: zibokere@yahoo.co.uk Phone: 08037079321 Prof. C. C. Mbajiorgu – Editor, Emerging Technologies Agricultural and Bioresources Engineering Department, University of Nigeria, Nsukka, Nigeria. E-mail: const.c.mbajiorgu@talk21.com Phone: 07038680071 Prof. (Mrs) Z. D. Osunde – Editor, Processing and Post Harvest Engineering Agricultural Engineering Department, Federal University of Technology, Minna, Niger State, Nigeria. E-mail: zinashdo@yahoo.com Phone: 08034537068 Mr. Y. Kasali – Business Manager National Centre for Agricultural Mechanization, PMB 1525, Ilorin, Kwara State, Nigeria. E-mail: ncam@skannet.com Phone: 08033964055 Mr. J. C. Adama – Editorial Assistant Agricultural Engineering Department, University of Agriculture, Umudike, Abia State, Nigeria. E-mail: josephadama@yahoo.com Phone: 08052806052 Dr. B. O. Ugwuishiwu – Editorial Assistant Agricultural and Bioresource Engineering Department, University of Nigeria, Nsukka, Nigeria. E-mail: ugwuishiwubo@yahoo.com Phone: 08043119327 Miss I. C. Olife – Technical Assistant to Editor-In-Chief Raw Materials Research and Development Council, Abuja, Nigeria. E-mail: ifeeolife@yahoo.com Phone: 08033916555