Ken Stalder at Iowa State University and Curt Lacey of the University of Georgia offer the Sow Longevity Spreadsheet. The spreadsheet is designed to help producers determine optimum times for keeping sows in their operations using operation-specific production and financial information. Available via e-mail and online in English (English and metric measurements), Chinese and Portuguese.
ISU, University of Georgia Sow Longevity Spreadsheet
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