Bull management for efficient reproduction
"Superior herd sires properly managed are the greatest asset in a cow-calf operation. Generally, the herd bull contributes 50 percent of the total genetic variation of your calf crop annually. In most closed herds, however, the past three herd sires contribute 85 to 90 percent of the total genetic variation in the herd. This high percentage is due to selection intensity or replacement rate of cows and bull."--First page.
Archive version. For the most recent information see extension.missouri.edu.
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