Performance Recording

Little genetic improvement can be achieved without objective measurement of traits targeted for improvement. Countries vary considerably in percentage of cows that are in milk-recording programs. In the United States, slightly less than 50% of dairy cows are enrolled in a dairy records management program that supplies performance records to the national database, and parentage of only about 65% of those cows is known.

The first traits to be evaluated nationally in the United States were milk and butterfat yield and percentage. During the 1970s, national evaluation of protein yield and percentage, conformation traits, and calving ease (dysto-cia) began.[1] Evaluations for longevity (productive life) and mastitis resistance (somatic cell score) became available during the 1990s. The most recent trait to be evaluated by the U.S. Department of Agriculture is daughter pregnancy rate, which is a measure of cow fertility.

How To Add Ten Years To Your Life

How To Add Ten Years To Your Life

When over eighty years of age, the poet Bryant said that he had added more than ten years to his life by taking a simple exercise while dressing in the morning. Those who knew Bryant and the facts of his life never doubted the truth of this statement.

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