Analysis to Assess Potential Economic Benefits of WTM by SI H. W. Belcher Michigan State University Study Objective Develop a means of easily examining the economic feasibility of subirrigation. Why Farmers were interested in converting drainage systems to subirrigation. Biggest question - would it make them money? Constraints easy to use flexible allow site specific application Annual Cost of System Capital Cost Operation: Labor, Power Maintenance Annual Income Increase = value of yield increase SI-ECON Example Example (continued) What If - Market Price What If - Capital Cost Conclusions SI often provides increase yield for field corn / soybean rotations grown in Michigan. Increased yield may not result in increased profit. SI-ECON provides a means of easily evaluating the economic feasibility of SI on a site by site basis.