Browsing Texas A&M AgriLife Extension Service by Author "Hammack, Stephen P."
Now showing items 1-14 of 14
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Hammack, Stephen P. (Texas Agricultural Extension Service, 1986)
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Hammack, Stephen P.; Gill, Ronald J. (2000-05-03)A beef cow requires energy, protein, minerals and vitamins in its diet. Many factors, including forage quantity and quality and animal body condition, affect the amounts of required nutrients.
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Hammack, Stephen P.; Maddox, Jr., L. A. (Texas Agricultural Extension Service, 1977)
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Hammack, Stephen P. (2009-01-27)Animal performance is determined by genetics, environment and the interaction between the two. This publication illustrates the interaction of genetics with physical environment, nutrition, management, and economics.
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Hammack, Stephen P. (2008-03-18)A fundamental challenge in commercial beef production is matching genetic capability with climatic, nutritional, management and market conditions. This publication discusses functional levels of types and breeds of cattle ...
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Hammack, Stephen P. (2009-06-17)This publication explains the origin of cattle breeds and reasons for combining them. It also lists the major breeds in Texas and recent breed combinations without registries.
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Hammack, Stephen P.; Gill, Ronald J. (2009-04-02)Body size is an important genetic factor in beef cattle production. Size is most accurately estimated by considering several factors, such as weight, skeletal size and body condition. Frame Scores are a way of estimating ...
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Hammack, Stephen P. (2007-09-19)This publication is an overview of the genetic strategies that can help beef cattle producers have more successful and profitable operations. When managing the genetics of beef cow herds, producers should consider production ...
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Hammack, Stephen P.; Gill, Ronald J. (2009-03-30)Body size and milking potential are important genetic traits in beef production. Wide ranges of body size can be efficient, depending on production environments, breeding systems and carcass specification. Biological ...
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Hammack, Stephen P. (2003-08-20)Beef cattle producers face two types of breeding decisions--which animals will be allowed to reproduce and which males will be bred to which females. This leaflet describes various breeding systems in detail and discusses ...
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Hammack, Stephen P. (2009-03-30)Choosing types of sires is one of the most important genetic decisions facing beef producers. This publication discusses the factors to consider in matching sires to a cow herd--environmental and management conditions and ...
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Hammack, Stephen P.; Paschal, Joseph C. (2003-08-20)This publication for beef producers discusses the role of genetic selection in producing beef cattle. It explains the traits included in a genetic evaluation of producing stock, how to interpret EPD scores and how to use ...
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Hammack, Stephen P. (2003-08-20)This publication discusses the traits that are desired in beef carcasses, including the genetic component to carcass quality. It also explains ways to improve beef quality by selective breeding techniques.
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Cleere, Jason; Mazurkiewicz, Jim; Hammack, Stephen P. (2008-02-28)With as many as 16 breeds and breed-cross classes in Texas shows, classifying the breed of a show steer is not always easy. Show steers are sorted into breed classes based on visual characteristics, which is often a matter ...