A Simplified Method of Estimating 305-Day Lactation Production
نویسندگان
چکیده
منابع مشابه
Short communication: best prediction of 305-day lactation yields with regional and seasonal effects.
In the United States, lactation yields are calculated using best prediction (BP), a method in which test-day (TD) data are compared with breed- and parity-specific herd lactation curves that do not account for differences among regions of the country or seasons of calving. Complete data from 538,090 lactations of 348,123 Holstein cows with lactation lengths between 250 and 500 d, records made i...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1944
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(44)92623-8