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Rounding dairy herd improvement milk weights to the nearest pound


, : Rounding dairy herd improvement milk weights to the nearest pound. Journal of Dairy Science 55(10): 1517-1520

A random sample of test day milk wt. on 84 772 officially recorded (DHI) and 21 385 unofficially recorded cows in the NE USA was used to estimate the bias (the difference between the mean lactation yield estimate and actual milk yield) and the decrease in accuracy resulting from rounding milk wt. to the 0.25, 0.5 or 1 lb as compared to 0.1 lb. Milk wt. of DHI cows were calculated to be recorded to 0.1 lb on 39.9% of cows, to 0.25 lb on 25.4%, to 0.5 lb on 24.8%, and to 1 lb on 9.9%.

US$19.90

DOI: 10.3168/jds.S0022-0302(72)85708-4


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