摘要 : Data of 524,190 German Brown cows born between 1990 and 2001 was used to analyse the length of life, length of productive life and number of calvings. Date of birth, date of culling and milk production data were available for all ... 展开
作者 | Punsmann~ Teresa Duda~ J. Distl~ O. |
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作者单位 | |
期刊名称 | 《Zuchtungs Kunde》 |
总页数 | 14 |
语种/中图分类号 | 德语 / S8 |
关键词 | Length of life length of productive life number of calvings German Brown |
馆藏号 | N2008EPST0012995 |