A Study of Factors Concerning Herd Management and Herd Production
نویسندگان
چکیده
منابع مشابه
Dairy operation management practices and herd milk production.
A national US survey collected data on herd milk production and management of Holstein herds. Step-wise selection identified management practices that were related to herd milk production using only operations that calculated herd milk production as well as using data from all operations. Results were similar. Milk production was highest in the West. Operations with < 100 dairy cows had lower p...
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Correspondence and reprint requests should be addressed to: Prof. David A. Sack Executive Director ICDDR,B: Centre for Health and Population Research GPO Box 128, Dhaka 1000 Bangladesh Email: [email protected] Fax: +(880-2) 882 3116 Recent analysis of results of the 1985 vaccine trial in Bangladesh showed that a killed oral cholera vaccine could provide herd protection (1), and this finding shed...
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An Ayrshire dairy herd was investigated for occurrence of ocular abnormalities in new-born calves. Ophthalmic examinations were performed on all the animals in the herd and 26% of them were diagnosed with bilateral cataracts. Cataracts varied in extent and severity but the majority were restricted to the lens nucleus. Epidemiological analysis showed the prevalence was higher in male animals and...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1939
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(39)92879-1