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نمایش تعداد 1-10 از 22

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    Reasons for culling in Iranian Holstein cows 

    نوع: Conference Paper
    نویسنده : عباسعلی ناصریان; M. Sargolzaee; محمدهادی سخاوتی; B. Saremi; Abbas Ali Naserian; Mohammad Hadi Sekhavati
    سال: 2006
    خلاصه:

    Culling of dairy cows is probably one of the most complex decisions

    in dairy operations. It involves several factors and farmers consider

    e.g. stage of lactation, age, health status, level of milk production

    and current...

    Dynamics of culling for Jersey, Holstein, and Jersey × Holstein crossbred cows in large multibreed dairy herds 

    نوع: Journal Paper
    ناشر: American Dairy Science Association

    REASONS FOR CULLING IN HOLSTEIN DAIRY HERDS IN MASHHAD SUBURB, KHORASAN RAZAVI PROVINCE, IRAN 

    نوع: Conference Paper
    نویسنده : محمد عزیز زاده; علیرضا باهنر; عطیه سیدیان مقدم; Mohammad Azizzadeh; Atieh Seyedian Moghaddam
    سال: 2010
    خلاصه:

    The aim of the study was to determine the causes of lactating cow culling that influence the length of cow utilization in dairy herds.

    Data regarding number of culling, parity at culling and reason(s) for culling were collected in a one...

    Evaluation of mastitis as a cause of lameness and digital lesions in dairy cows 

    نوع: Conference Paper
    نویسنده : احمدرضا محمدنیا; Ahmad Raza Mohamadnia
    سال: 2016
    خلاصه:

    Lameness and mastitis beside infertility are major health concern and economic loss in dairy herds that affect animal health and reduce productivity and comfort of the cows.

    Regards to occurrence of lameness after ...

    Factors associated with age at slaughter and carcass weight, price, and value of dairy cull cows 

    نوع: Journal Paper
    ناشر: American Dairy Science Association

    Bovine leukemia virus and cow longevity in Michigan dairy herds 

    نوع: Journal Paper
    ناشر: American Dairy Science Association
    سال: 2013

    The effect of repeated episodes of bacteria specific clinical mastitis on mortality and culling in Holstein dairy cows 

    نوع: Journal Paper
    ناشر: American Dairy Science Association
    سال: 2013

    Evaluation of the culling rate in cows with interdigital necrobacillosis 

    نوع: Conference Paper
    نویسنده : احمدرضا محمدنیا; Ahmad Raza Mohamadnia
    سال: 2016
    خلاصه:

    Culling in cows is a complicated condition. Many factors such as, age (parity), milk production, fertility, health, season, feed price, and other variables may influence severity of this condition. Infectious foot diseases are common in dairy herds...

    Reasons for culling of Holstein dairy cows in Neyshabur area in northeastern Iran 

    نوع: Journal Paper
    نویسنده : غلامرضا محمدی; علی صدیقی; Gholam Reza Mohammadi; ; غلامرضا محمدی; علی صدیقی; Gholam Reza Mohammadi
    سال: 2009
    خلاصه:

    This study was designed to determine the culling rates of 23 Holstein dairy herds (with an average size of 180 cows per herd) in Neyshabur area in northeastern Iran over a period of three years from 2001 to 2003. The average annual culling rate...

    Characterisation and pattern of culling in Holstein-Friesian dairy herds in Khorasan Razavi Province, Northeast of Iran 

    نوع: Journal Paper
    نویسنده : محمد عزیز زاده; Mohammad Azizzadeh
    سال: 2011
    خلاصه:

    To describe proportion and pattern of culling in commercial dairy herds of Khorasan Razavi province, this survey was carried out from 21st March 2008 to 20th March 2009 in 15 industrialized dairy herds. For each culled cow data related to parity...

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