1. Analysis to Assess Potential Economic Benefits of WTM by SI H. W. Belcher Michigan State University

2. Study Objective Develop a means of easily examining the economic feasibility of subirrigation.

3. Why Farmers were interested in converting drainage systems to subirrigation. Biggest question - would it make them money?

4. Constraints easy to use flexible allow site specific application

5. Annual Cost of System Capital Cost Operation: Labor, Power Maintenance

6. Annual Income Increase = value of yield increase

7. SI-ECON

10. Example

11. Example (continued)

14. What If - Market Price

15. What If - Capital Cost

16. 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.