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The process of identifying the "relevant constraints" and their incidence on breeding programs and agricultural research of international centers are explained and case histories are provided on the role of these 3 types of information (macro stage, micro stage, critical inference stage) related ...


Sanders, J.H.Lynam, John K.[Systems of production of beans and cassava in Latin America with implications for research design]Systems of production of beans and cassava in Latin America with implications for research design

La Colorada, on the North Coast of Colombia, was chosen by CIAT to study new technology validation in cassava. Trials measured the productivity of improved cassava production technology under actual field conditions, defined factors limiting cassava yields that may have been overlooked in the des...


Lynam, John K.[New technology validation in cassava]New technology validation in cassava

Agricultural research in developing countries has lacked relevance to farm-level production problems, especially appropriate technologies for small-scale or limited-resource farmers. Currently research institutions are directing their efforts towards these objectives. This paper is a preliminary ...


Lynam, John K.Sanders, J.H.[The role of economists in on-farm testing in agricultural research]The role of economists in on-farm testing in agricultural research

In Brazil, the world`s largest bean producer, the annual production value is over US$ billion. Beans contribute more to total national protein consumption than any other product, especially among the poor, who get over 30 percent dietary protein from beans. Available technological options for imp...


Pachico, Douglas H.Jones, Peter G.Lynam, John K.[An Ex-Ante analysis of the distribution of benefits from technical change among classes of consumers and producers: the case of beans in Brazil]An Ex-Ante analysis of the distribution of benefits from technical change among classes of consumers and producers: the case of beans in Brazil

The different methodological stages of cassava on-farm trials and their relationships regarding the objectives and functions of the Cassava Program at the Centro Internacional de Agricultura Tropical (CIAT) are outlined. Site selection, farm trial design and analysis, and some illustrative result...


Lynam, John K.[Methodology in the cassava on-farm trials: An interim evaluation]Methodology in the cassava on-farm trials: An interim evaluation

Lynam, John K.[Metodología en los ensayos de yuca a nivel de fincas: (Una evaluación intermedia)]Metodología en los ensayos de yuca a nivel de fincas: (Una evaluación intermedia)

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