نتایج جستجو برای: holsteins

تعداد نتایج: 728  

Journal: :Journal of Dairy Science 2021

The objectives of this study were to estimate genetic parameters for stayability in US organic Holstein dairy cows and correlations with nationally evaluated traits interest. Stayability is the binary trait success or failure remain herd until a given time point. We used birth, calving, cull dates from 16 USDA certified farms recommended by industry personnel as herds maintaining individual cow...

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