... There are several research methods emphasizing farmer participation, for instance; farmer field schools ( Olanya et al., 2010 ), field or on-farm trials ( Haggar et al., 2001 ), participatory monitoring ( Belcher et al., 2013 ;Dangles et al., 2010 ), and participatory rural appraisal (Shamsuddin et al., 2007). In addition, the methods employing data collection tools such as activity profiles, flow diagram, interactive timelines, mobility diagrams, photoelicitation, pie charts, matrix ranking, preference ranking and scor- ing, seasonal calendar, social mapping, storytelling, system analysis diagram, systematization matrix, vignettes, and workshops require participation of stakeholders as well (Bartels et al., 2103;de Souza et al., 2012 ;Naylor et al., 2014 ;Shamsuddin et al., 2007;Sherren and Verstraten, 2013 ;Sow et al., 2015 ). ...