A Systematic Review of Technology Acceptance and Discontinuance Dynamics for Improved Cassava Planting Material among Ibadan's Peri-Urban Smallholders

{ "background": "The adoption of improved cassava planting material (ICPM) is critical for enhancing productivity and food security among smallholders. However, sustained use is often undermined by discontinuance, a dynamic poorly understood within peri-urban agricultural systems.", "purpose and objectives": "This systematic review synthesises evidence on the determinants of both adoption and disadoption of ICPM by peri-urban smallholders in Ibadan, analysing these dynamics through the lens of the Technology Acceptance Model (TAM).", "methodology": "A systematic search of multiple academic databases was conducted following PRISMA guidelines. Studies were screened against pre-defined eligibility criteria. Data were extracted and analysed thematically, with determinants mapped to TAM constructs (Perceived Usefulness, Perceived Ease of Use). A meta-analytic structural equation modelling framework, \ηAdoption = \γ1\ξPU + \γ2\ξPEOU + \ζ, was proposed to synthesise path coefficients, with robust standard errors estimated to account for study heterogeneity.", "findings": "Findings from the synthesised literature indicate that disadoption rates can exceed 40% within three seasons post-initial adoption. Perceived Usefulness, driven by yield gains, was the strongest adoption predictor, whereas Perceived Ease of Use was frequently compromised by logistical barriers in stem sourcing. A key theme was the critical influence of vendor trust and proximity on continued use.", "conclusion": "The review concludes that technology acceptance for ICPM is a non-linear process where initial adoption does not guarantee sustained use. Discontinuance is a significant, often overlooked outcome shaped by post-adoption experiential factors and supply chain failures.", "recommendations": "Future interventions must integrate robust, accessible supply mechanisms and post-distribution support to mitigate disadoption. Research should employ longitudinal designs to better capture the temporal dynamics of technology discontinuance.", "key words": "technology adoption, disadoption, cassava,