selected publications
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article
- Crop improvement, adoption, and impact of improved varieties in food crops in sub-Saharan Africa 2015
- Changing milk production trends in Peru: Small-scale highland farming versus coastal agrobusiness. Mountain Research and Development. 21:268-275. 2001
- Estimating the global severity of potato late blight with GISālinked disease forecast models. Plant Pathology. 49:697-705. 2000
- World trends and patterns in the potato crop: An economic and geographic survey. Potato Research. 42:241-264. 1999
- Evaluating biological productivity in intercropping systems with production possibility curves. Agricultural Systems. 36:137-157. 1991
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document
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working paper