LIMOUSIN TODAY LimToday-April 2018-WEB | Page 26

Management BeefTalk: Do Not Be Afraid to Moderate Cow Size, But Select Good Bulls By Kris Ringwall, NDSU Extension Service “How does a beef producer get a handle on cow size?” is an often-asked question I get during bull-buying workshops. The question is complex because the foundation of the “cow size” issue rests with the development and implementation of cattle breeding systems. Bulls produce at least two types of calves: one type for terminal production and one type destined to be replacements within the breeding herd. The proper utilization of a breeding system has the potential to maximize the use and benefits of both types of calves. The beef industry has gotten along selecting good growth and efficient bulls, and keeping females from those bulls as replacements. I guess that works, but the question remains, 24 | APRIL 2018 “How does a beef producer get a handle on cow size without effective breeding systems?” Here’s a story regarding cattle at the Dickinson Research Extension Center. From 2008 to 2011, we established two cow herds to develop a set of smaller cows to use on range research projects. The smaller cattle averaged 38 to 40 inches (frame score 2.6) at the hip at fall weaning, and the larger cattle averaged 43 to 44 inches (frame score 4.9). The smaller-framed cows were designated as “range” and the moderately framed cows were designated as “beef.” Interestingly, the average mature (6 to 8 years of age) weight was 1,295 pounds for the “range” cows and 1,522 pounds for the “beef” cows. Throughout the lifetime of these cows, more than once a raised eyebrow was evident, even from me. In the back of my mind were two nagging question: “Where does this weight come from?” and “How do cows that averaged a frame score 2.6 as calves at weaning mature out at 1,295 pounds?” I had no question about the cows that averaged a frame score 4.9 as calves at weaning and weighed 1,522 pounds as mature cows. So how does one explain the performance of these smaller cows and their subsequent calves to an industry very focused on growth and efficiency? That focus defines a strong tie between increasing growth and efficiency within the beef business, keeping in mind that growth and efficiency