Armstrong Research and Demonstration Farm
ISU purebred Angus cow 98398 is a story of longevity and productivity. As the oldest cow in the ISU McNay herd, she is 16 years old, born April 19, 1998 at the former ISU Rhodes Farm, Rhodes, Iowa, Marshall County. She had her first calf in 2001 and has calved every year since, including twins in 2006 and 2008. She and the rest of the ISU research Angus beef herd moved to the ISU McNay Research Farm, Chariton, Iowa, in 2004. She is due with her 16th calf this fall (a heifer), which will make 16 calves in 14 years of calving. With the 2014 calf, she will have had eight bulls and eight heifers averaging 82.5 lb at birth (Table 1). The average adjusted weaning weight of her calves is 515.4 lb (Table1).
Iowa State University
Maher, Kevin; Markey, Alysta D.; and Honeyman, Mark S., "ISU Angus Cow 98398: A Model of Longevity" (2014). Iowa State Research Farm Progress Reports. 2082.