rdf-syntax-grammar
mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    non sort: The
    title: predictability of performance factors and costs affecting the cost of gain of fed cattle in Texas feedyards
  name:
    name part: Harkey, Gary Don
    name part: 1961-
    role:
      role term: creator
  name:
    name part: Conner, J. R.
    role:
      role term: degree committee member.
  name:
    name part: Edwards, J. W.
    role:
      role term: degree committee member.
  name:
    name part: Mies, W. L.
    role:
      role term: degree supervisor.
  name:
    name part: Turner, J. W.
    role:
      role term: degree committee member.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses
  genre: Statistics.
  origin info:
    place:
      place term: xx
    date issued: 1992
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: x, 81 leaves : illustrations ; 28 cm
  abstract: Data including actual measures and estimates of various performance and cost factors were collected from three commercial feedyards located in the Texas Panhandle. The effectiveness with which such performance and cost factors were estimated was evaluated. Correlation coefficients between estimated and actual performance measures ranged from a low of .43 to a high of .93 while correlations between estimated and actual cost measures ranged from a low of .21 to a high of .69. Statistical analyses were performed on the data to evaluate the effects of yard (YD), year (YR), sex (Sex), placement month (InMo) and initial weight class (IWtC) on average daily intake on an as-fed basis (Int), average daily gain (ADG), feed conversion (FC), percent death loss (%DL), veterinary medicine and services cost (VCst) and cost of gain (COG). To facilitate the development of predictive means, additional analyses were performed which evaluated the combined effects of sex, placement month and initial weight class (SMWt) on the various performance and cost measures. Least-squares means and standard errors for intake as a percent of average weight (%Int) by SMWt were used in conjunction with estimated average weight to predict Int. Predictions of ADG were obtained via the Lofgreen-Garrett equations to which an adjustment factor based on InMo was applied. Predictions of FC were mathematically calculated. Least-squares means for %DL by sex * placement month * initial weight class published by Underwood (1991) were used to predict %DL and associated costs (DLCst) and VCst. Feed costs, COG and breakeven costs were mathematically calculated. Though accuracy of prediction was improved, the new predictions were not substantially more accurate than original estimates for Int, ADG, FC, or COG. Predictions of %DL, DLCst, and VCst were substantially more accurate than original predictions. However, due to the increased variability of these traits and their potential impact on COG, predictive accuracy…
  note: "Major subject: Animal Science."
  note: Vita.
  note: Ph. D. Texas A & M University 1992
  note: Includes bibliographical references.
  subject:
    geographic code: n-us-tx
  subject:
    topic: Beef cattle
    topic: Feeding and feeds
    geographic: Texas
  subject:
    topic: Cattle
    topic: Feed utilization efficiency
    geographic: Texas
    genre: Statistics
  subject:
    topic: Feedlots
    topic: Economic aspects
    geographic: Texas
  subject:
    topic: Major animal science
  subject:
    topic: Beef cattle
    topic: Feeding and feeds
  subject:
    topic: Cattle
    topic: Feed utilization efficiency
  subject:
    topic: Feedlots
    topic: Economic aspects
  subject:
    geographic: Texas
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-1433035
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-1433035
  record info:
    record content source: TXA
    record creation date: 941026
    record change date: 20220103134900.0
    record identifier: in00001202206
    language of cataloging:
      language term: eng