In Sub-Saharan Africa (SSA), maize (Zea mays L.) production is characterized by low productivity due to the poor availability of external inputs exacerbated by climate va- riability. In Benin, the on-farm effect of different compost-biochar-based amendments on maize performance was evaluated with maize producers (n = 40). Across sites, fer- tilization increased grain yields by 90-106% for compost (CP) and terra preta (TP) and by 222% for MF compared to the control. Among the organic amendments, TP1-200 induced the best performance on growth and yield variables and was more stable ir- respective of the environment. Thus, substituting MF by TP or complementing half dose of MF with TP may be a cheap strategy to achieve sustainable farming. However, further on-farm experiments facilitated by the development of Digital and Decision Support Tools (DDST) are needed across a broader range of locations in Benin to better unders- tand maize response to compost-biochar-based amendments and farmers and institu- tional responses relative to this innovation. 315 DOI : 10.17180/NP12-JB28