Correcting bias from the standard linear adjustment of weaning weight to an age-constant basis for beef calves
Article Abstract:
The use of specific linear and quadratic coefficients to remove bias from standard computations of 180-day weights of beef cattle was validated. Results showed that the standard equation for computing age-adjusted weight did introduce bias, albeit inconsistently. The correction factors tested were unsuccessful in removing this bias from the computations, and the use of inappropriate correction factors could compound the problem. The standard equation was thought to be adequate for the cattle breeds used in the study.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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Charles F. Curtiss, 1863-1946: a brief biography
Article Abstract:
Dean Charles F. Curtiss developed the fields of agronomy and animal husbandry at Iowa State College (ISC) during his tenure as Dean of Agriculture from 1902 to 1932. He was also instrumental in the development of the agricultural journalism and agricultural engineering departments. Curtiss earned his bachelor's degree in 1887 and his master's degree in 1894, both from ISC. He instilled in his students the dignity of agriculture which is probably his greatest legacy. He died in 1946.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
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Adjusting weight for body condition score in Angus cows
Article Abstract:
Body condition score was found to be a significant source of variation in the weight of Angus cows. However, the weight:height ratio showed a relatively low correlation with body condition score. Weight correlated more highly with condition score than height. The effects of herd, year-month and age had significant impact on both weight and height. The degree of fatness at a specific weight should be taken into consideration in the evaluation of mature cows.
Publication Name: Journal of Animal Science
Subject: Zoology and wildlife conservation
ISSN: 0021-8812
Year: 1992
User Contributions:
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