Assessing Climate-Resilient Tomato Production in Zimbabwean Smallholder Cooperatives

Thesis Abstract

Smallholder tomato production in Zimbabwe faces increasing climate variability, declining soil fertility, and limited access to adaptive inputs, undermining yield stability and farmer livelihoods. This study investigates climate-resilient tomato production within Zimbabwean smallholder cooperatives to identify actionable pathways for enhancing resilience, productivity, and value-chain integration. The aim is to evaluate how climate-smart agronomic practices, access to finance and extension services, and cooperative governance influence tomato yield stability under changing rainfall and temperature regimes. Specific objectives are (1) to quantify the relationship between climate-smart agronomic practices (e.g., mulching, drip irrigation, drought-tolerant cultivars) and tomato yield variability; (2) to examine the role of cooperative governance, market access, and credit access in enabling climate-resilient production; (3) to assess farmers’ perceptions of climate risks and adaptation capacity; (4) to model the determinants of adaptation intensity and their impact on profitability; and (5) to develop a context-specific framework for climate-resilient tomato production in Zimbabwean smallholder cooperatives. A mixed-methods design integrates a cross-sectional survey with qualitative interviews. The population comprises registered tomato-producing households within three representative cooperatives in Mashonaland West, Matabeleland North, and Manicaland provinces. A stratified random sample of 360 farming households is drawn, supplemented by 30 key informants from cooperative management, extension services, and input suppliers. Data collection employs structured questionnaires to capture agronomic practices, input use, climate risk exposure, financial access, and productivity, alongside semi-structured interviews and focus group discussions to explore governance dynamics, social capital, and adaptation decisions. Validity and reliability are ensured through pretesting, pilot work (n=40), and Cronbach’s alpha assessment for multi-item scales. Climate data (daily rainfall, temperature) for a ten-year period are obtained from the Zimbabwe Meteorological Services and local agro-meteorological stations to construct climate risk indicators. Regression analysis, including fixed-effects models and a random-intercepts approach, tests hypotheses on the determinants of adaptation intensity and yield stability; stochastic frontier analysis estimates efficiency gains from climate-smart practices; and structural equation modeling examines causal pathways among governance, access to resources, adaptation behavior, and economic outcomes. Qualitative data are analyzed thematically using a framework approach anchored in the diffusion of innovations and institutional theory, with triangulation to reinforce interpretation. The study also employs a propensity score matching technique to compare adopters and non-adopters of key climate-smart practices to mitigate selection bias. Key expected findings include (i) climate-smart practices, particularly drip irrigation and mulching, are associated with reduced inter-annual yield variability and higher expected yields under drought scenarios; (ii) cooperative governance, including transparent profit-sharing and collective input procurement, significantly enhances access to credit and inputs, thereby increasing adaptation intensity and profitability; (iii) farmers’ risk perceptions align with experiential climate forecasts, yet information asymmetry and trust deficits constrain timely adaptation; (iv) financial constraints and limited extension support remain primary barriers to scaling climate-resilient tomato production; and (v) an integrated framework linking agronomic, organizational, and financial dimensions yields the highest predicted profitability under mid-range climate projections. The study contributes to knowledge by combining agronomic effectiveness with organizational capacity in a real-world cooperative setting, generating transferable insights for policy-makers, extension services, and cooperative managers seeking to institutionalize climate resilience in horticultural value chains. It advances theoretical understanding by integrating diffusion of innovations with resource-based and institutional perspectives to explain adoption and performance in smallholder tomato systems. Practical implications include actionable recommendations on (a) prioritizing drip irrigation and soil moisture management; (b) strengthening cooperative governance, finance access, and market linkages; and (c) developing training modules and extension messages tailored to climate risk profiles. The conclusions advocate for national and regional extension programs that co-create climate-resilient tomato production pathways with farmer cooperatives, informed by robust empirical evidence on the determinants of adaptation success and economic viability. Recommendations emphasize scalable financing mechanisms, climate-information services, and governance reforms to sustain resilience and productivity in Zimbabwe’s tomato value chain.