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On-farm trials are an effective way to improve client-orientation of breeding programs by formalizing farmer involvement in the variety testing process. They can also be an important first step in variety dissemination, since data from on-farm trials are usually required for official varietal release, and farmers will be keen to obtain planting materials of varieties that perform well in trials. Standardization of procedures is important for easy and meaningful analysis and presentation of results. However, circumstances, including population density, the presence of organized farmer groups, their previous experience with sweetpotato, and budgets can dictate varying approaches to on-farm variety testing. The set of procedures below present a standard method for on-farm sweetpotato variety testing used (with slight variation) by sweetpotato breeding programs in SSA during the 2011/2012 season. They include separate documents for; a) overall conduct and analysis of selection trials, b) on-farm trial procedures, and c) forms for data collection. The standard trial methods are also fully covered and incorporated in the CloneSelector program and its instruction manual.


2012. On farm participatory variety testing-protocol.