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...Study program of agribusiness faculty agriculture university udayana jalan p b sudirman denpasar indonesia corresponding author wba sosek unud yahoo com received january accepted september intensive farming low fertility soil with limited water source can lead to tradeoff between economic benefits in the short run and environmental problems long degradation inefficient resources allocation will affect unsustainable systems this aims develop sustainable irrigated system sifs model at household level north coastal plain bali primary data from farmers by using survey method representative scheme secondary various sources were used specify parameters linear programming analysis was solve constrained optimization problem a small farmer ha land holding efficient as indicated optimal solution conventional cifs which conforms observed behavior several adjustments be extended achieve condition should able apply groundwater less than or equal l s organic fertilizer manure more t yr mixedfarming ...