Journal of Development and Agricultural Economics 2006-9774 Academic Journals 10.5897/JDAE.9000025 M. R. Jarsquo;afar-Furo K. Bello A. Sulaiman * E-mail: jaafarfuro@yahoo.com 2011 31 03 2011 05 03 2011 3 3 144 149 This is an open-access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This article is available from https://academicjournals.org/journal/JDAE/article-abstract/4F2A9B62379 The full text article is available as a PDF file from https://academicjournals.org/journal/JDAE/article-full-text-pdf/4F2A9B62379