This study investigates the influence of agricultural facilities and infrastructure on farmer behavior in managing lowland rice farming in Kondamara Village, Lewa Subdistrict, East Sumba Regency, using the COM-B model (Capability, Opportunity, Motivation–Behavior). A quantitative approach was employed through Structural Equation Modeling–Partial Least Squares (SEM-PLS), with data collected from 100 farmers via structured questionnaires and field observations. The results reveal that agricultural infrastructure—such as irrigation systems, farm roads, and farmer groups—has a significantly stronger impact (path coefficient = 0.766; f² = 2.292) on farmer behavior than mechanized facilities (path coefficient = 0.219; f² = 0.187). The model's high predictive accuracy is demonstrated by an R² value of 0.852. These findings underscore the strategic importance of developing agricultural infrastructure and empowering farmer groups as key interventions to foster adaptive and sustainable farming behavior, particularly in food-insecure rural areas.
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