1. Adjei, O.E. , Aikins, S.H.M. , Boahen, P. , Chand, K. , Der, I. , Lu, M. , Mkrtumyan, V. , Samaraweera, S.D. and Teklu, A. (2003) Combining Mechanization with Conservation Agriculture in the Transitional Zone of Brong-Ahafo, Ghana. Working Document Series 108, Ghana; www.icra-edu.org/objects/public_en/Ghana2003FSreprt.pdf.