Brown Swiss Growth Chart Brown Swiss Heifer Growth Percentiles describe the percentage of observations that fall below that level. Recommended ranges represent the 50th to 67th percentile. Heifers in this survey had an average age at first calving of 24.9 ± 1.8 months. Ageĭata from the National Dairy Heifer Evaluation Project (1991-92). Recommended range of body weight and withers height for Jersey heifers. Range represents the average and 1 standard deviation above the average. Recommended range of hip height and width for Holstein heifers. The 50th percentile is the median half of the observations fall below this value and half fall above it. AgeġPercentiles describe the percentage of observations that fall below that level for example, 25% of the heifers at a given age weighed less than the value listed under the 25th column. Recommended ranges are between the 75th and 95th percentiles. For each age, percentile data 1 are presented to show the range of performance observed. Holstein heifers as measured in the National Dairy Heifer Evaluation Project (1991-92). Holsteins Withers Height by Month of Ageīody weight (pounds) and withers height (inches) of U.S. Holstein Growth Chart Holstein Heifer Growth To achieve early calving (24 months or less) and high production potential, individual heifers should fall near the top of or slightly above the range shown. Keeping a majority of heifers near the 75th percentile and the entire herd between the median and the 95th percentile is an achievable goal.įor all other breeds, the recommended growth ranges shown are between the average and the top 67th percentile of the population.
population, allowing a producer to compare an individual heifer to all others and to set growth goals. The Holstein heifer growth charts indicate several percentiles of the U.S. As a result, the heifers probably were smaller for any given age than those found on today's well-managed dairy farms that calve heifers at 22 to 24 months of age. Most of the data was collected from herds in which the average age at first calving was slightly greater than 24 months.
The charts are based on the results of measuring a large number of heifers of various breeds throughout the United States during 19. We designed breed-specific, printable Growth Charts that may be used to plot heifer growth by hand. Heifer growth is often compared to breed standards to determine 'normal' progress.
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