Crop variety improvement and its effect on productivity: the impact of international agricultural research
Evenson, R.E. & Gollin, D. 2003
This book represents the most comprehensive effort to date to document adoption and impacts of genetic improvement in the mandate crops of the CGIAR. CABI International, the publisher, has kindly given permission for us to post the full text of this book as a PDF. Please note that this is intended only for personal use and should not be posted to any other website.
Also see Diffusion and Impact of Improved Varieties in Africa (DIIVA) page, an initiative that aims to update these studies and related publication here .
Evenson, R.E. & Gollin, D. 2003. Crop variety improvement and its effect on productivity: the impact of international agricultural research. Wallingford (UK), Cabi publishing. 522 pp.