ВАРИАНС НА ПРОДЪЛЖИТЕЛНОСТТА НА ПРОДУКТИВНИЯ ЖИВОТ ПРИ КРАВИ ОТ ХОЛЩАЙН- ФРИЗИЙСКАТА ПОРОДА
The purpose of the current study was to determine the sources of specific variance of cow longevity. The study comprised 1440 cows from the Agricultural Institute farm originated from 119 sires belonging to five lines during the period from 1981 to 2006. Lactations are fixed from Ist to VIIst as if...
محفوظ في:
| المؤلف الرئيسي: | |
|---|---|
| التنسيق: | Artigo |
| اللغة: | Búlgaro |
| منشور في: |
Agricultural Academy
2011-08-01
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| سلاسل: | Животновъдни науки |
| الموضوعات: | |
| الوصول للمادة أونلاين: | https://agriacad.eu/ojs/index.php/bjah/article/view/685 |
| الوسوم: |
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