A.S. Series 67-31
A useful selection tool available to swine producers in recent years has been the ultrasonic animal tester, more commonly called the Sonoray. In creasing numbers of swine producers across the nation have adapted the sonoray to their selection programs in an attempt to more accurately evaluate breeding herd replacements. This report is intended to demonstrate ways that a South Dakota swine producer could use the sonoray in a selection program for total herd improvement. The use of the sonoray could aid the purebred producer in three ways. Number one, the sonoray could be used to select the best gilts after a preliminary selection has been made. Secondly , the information is an aid to prospective breeding stock customers. Third, the producer could utilize ultrasonic information when selecting herd sire replacements.
Number of Pages
Agricultural Experiment Station, South Dakota State University
Anderson, L.M.; Kortan, L.J.; and Wahlstrom, R.C., "Adaptation of Ultrasonics in the Selection Program" (1967). South Dakota Swine Field Day Proceedings and Research Reports, 1967. 8.