الفهرس يوجد فقط 14 صفحة متاحة للعرض العام
 |  | from | 137 |  |  |
| | | from | 137 | | |
المستخلص
The aims of this study were :1-estimate non-genetic factors affecting 90 days milk yield (90d MY),180 day milk yield (180 d MY), 305 day milk yield (305 d MY), and annual milk yield (AMY), for acommercial herd of friesian cattle raised in Egypt in Dalla farm.2- estimate phenotypic and genetic parameters for the same traits studied.3-construction of aseperate age correction factors for milk traits and comprasion of these factors to other published factors.