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- In the special issue: Returns to investment in plant genetic resource conservation and crop improvement research / edited by M. L. Morris and P. L. Pingali. Paper presented at an international conference "Why has Impacts Assessment Research Not Made More of a Difference?" held February, 2002, San Jose, Costa Rica.
- Morris, M.L. , Heisey, P.W.
- plant breeding , cultivars , varieties , agricultural research , economic analysis , crop yield , yield components , innovation adoption
- Journal Articles, USDA Authors, Peer-Reviewed