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摘要

描述
English: Holstein-Friesian milk cow

Because much of the cost of a cow is the feed and labor needed to maintain her, fewer but higher yielding cows mean lower priced milk. Dairy herd improvement ultimately benefits consumers.

That's why it's just as important to keep complete and accurate records as it is to keep the cows contented. The National Cooperative Dairy Herd Improvement Program has been tracking Bossy's milk yields since 1905.

Over the years, this program has made enormous contributions to dairy cattle breeding. ARS scientists receive the lactation records of all herds enrolled in the program and use the figures to rank the bulls that sire the nation's dairy cows and to rank the cows themselves.

The results of years and years of scientific dairying? Milk production has been trending upward for more than 25 years in the United States-from about 117,000 million pounds in 1970 to more than 150,000 million pounds in 1994-even though the number of milk cows has been reduced.
Nederlands: Een koe
日期 在2002年9月之前
date QS:P,+2002-09-00T00:00:00Z/7,P1326,+2002-09-00T00:00:00Z/10
來源 www.ars.usda.gov: Image Number K5176-3
作者 Keith Weller/USDA
授權許可
(重用此檔案)
Public domain This image is in the public domain because it contains materials that originally came from the Agricultural Research Service, the research agency of the United States Department of Agriculture.

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Black White cow in green grass field in farm (livestock)

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目前2023年8月29日 (二) 03:31於 2023年8月29日 (二) 03:31 版本的縮圖2,700 × 1,803(887 KB)ReichLover1997Reverted to version as of 21:09, 24 May 2006 (UTC)
2018年9月1日 (六) 00:42於 2018年9月1日 (六) 00:42 版本的縮圖2,190 × 1,680(725 KB)HohumCropped, colour adjust
2006年5月24日 (三) 21:09於 2006年5月24日 (三) 21:09 版本的縮圖2,700 × 1,803(887 KB)Siebrand{{Information| |Description= {{nl|Een koe}} {{en|Because much of the cost of a cow is the feed and labor needed to maintain her, fewer but higher yielding cows mean lower priced milk. Dairy herd improvement ultimately benefits consumers. That's why it's j

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