Edited by Dr. Jud Heinrichs, Professor of Dairy and Animal Science, Dairy Digest features articles by Penn State's experts in dairy management, engineering, herd health, and related areas. Dairy Digest has been published by the Department of Dairy and Animal Science and Penn State Cooperative Extension since 1963.
Within a certain range of temperatures called the thermoneutral zone or TNZ, calves can maintain body temperature without needing extra energy.
To keep calves healthy, everything comes down to good hygiene.
Cows with shorter days dry have longer lifetime days in milk.
While controversy continues as to the exact role of antibiotic use in animals and linkage to increased resistant populations of bacteria, many producers and veterinarians feel antibiotics do not work as well as they did years ago.
Stillbirth is a major issue within the dairy industry.
Significant changes have come to minimum wage laws. To understand how farmers are affected we must begin with laws that affect all employers.
All the information presented in this article is directed to dairy farmers who are classified as “commercial” or “industrial” customers of electricity. If you are classified as a “residential” customer, this article does not apply to you because your price for electricity is based on a flat (or nearly flat) rate of x cents per kWh (kilowatt-hour).
The key performance indicator for reproductive performance is 21-day Pregnancy Rate (PR).
Based on a large data set of first services (16,587), J.M. DeJarnette and coworkers at Select Sires, Inc. compared the reproductive performance of Holstein heifers inseminated with sex-sorted semen (SS) vs. conventional non-sorted semen (CS).
At the recent annual meeting of the American Dairy Science Association, scientists from around the world presented the latest results from current research. We've summarized some of the new and interesting findings that affect calf health, feeding, and management.
Members of Penn State's Dairy Science Club were victorious in the quiz bowl competition at the 2007 American Dairy Science Association-American Society of Animal Science annual meetings in San Antonio, TX, in early July. It marks the sixth time in seven years that the Penn Staters won first place in the quiz bowl.
When dairy producers try to assess the profitability of their business, it can be difficult to pinpoint which specific elements are negatively impacting the bottom line. To help consultants and their clients better understand and overcome these bottlenecks to profitability, Penn State's Dairy Extension and Dairy Alliance have created the Profitability Assessment Dairy Tool (PA Dairy Tool), giving a whole-farm view to better identify key weaknesses.
The good news is U.S. herd SCC continues to decrease.
Dr. Larry Specht, professor emeritus of dairy science, has compiled a history of red and white Holsteins, which offers an overview of how the existence of red and white dairy cattle evolved in the United States when all of the early Holsteins imported from the Netherlands were black and white.
In the last 5 to 10 years, immigrants from Mexico and other Spanish-speaking countries have discovered the great demand for farm employees in Pennsylvania.
DAS welcomes Dr. Wansheng Liu and Dr. Jon M. Oatley.
There are several hazards associated with a bunker silo, and not all are as obvious as are some other types of farm hazards. Everyone who has to work around a bunker silo should be able to recognize the risks and apply good safety habits.
Many factors have been identified for the apparent reduction in fertility and there is no doubt the current problem is multi-faceted and not easy to resolve.
Human beings are complex and motivation is a social and psychological state that does not lend itself to simple answers.
It appears that the PA dairy industry is continuing to give this technology a good hard look and several of our dairy herds are being reliably milked with milking robots.