The practical application of age conversion factors to dairy cattle production (butterfat) records

被引:5
作者
Ward, AH
Campbell, JT
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D O I
10.1017/S0021859600050942
中图分类号
S [农业科学];
学科分类号
09 ;
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页码:509 / 522
页数:14
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  • [1] Factors affecting the yield and qualtty of milk. I. The age of the cow.
    Kay, RR
    M'Candlish, AC
    [J]. JOURNAL OF AGRICULTURAL SCIENCE, 1929, 19 : 342 - 372
  • [2] SANDERS HG, 1928, J AGR SCI, V18, P61
  • [3] TUFF P, 1931, 9 WORLD DAIRY C REP, P151
  • [4] 1933, REP ILL AGR EXP STA