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Full-Text Articles in Life Sciences
Sdsu Cow/Calf Teaching And Research Unit, Cody Wright, Kevin Vander Wal, George Perry
Sdsu Cow/Calf Teaching And Research Unit, Cody Wright, Kevin Vander Wal, George Perry
South Dakota Beef Report, 2013
The SDSU Cow/Calf Unit (CCU) is a multi‐purpose facility that provides resources for Animal Science courses and research projects. Cattle produced at the facility are also utilized by Little International, Block and Bridle, and livestock judging teams. The facility is managed by Kevin Vander Wal and generally employs 4 to 5 undergraduate students.
Sdsu Calf Value Discovery 2012/2013 Summary Report, J.A. Walker, W.C. Rusche
Sdsu Calf Value Discovery 2012/2013 Summary Report, J.A. Walker, W.C. Rusche
South Dakota Beef Report, 2013
The Calf Value Discovery Program (CVD) allows cow‐calf producers to gain knowledge of the finishing segment of the beef cattle industry and the marketing of fed cattle. Specifically, CVD provides an opportunity for cow‐calf producers to learn how their calves perform in a feedlot and their carcass value when sold in a value‐based marketing system. Each producer taking part in the program could consign 5 or more steers weighing between 500 and 800 pounds to the CVD program. Animals were finished at VanderWal Yards (Bruce, SD) in a calf‐fed program using typical diets and management protocols. Carcass and feedlot performance …
Walking Distance And Performance Of Drylot Developed Beef Heifers Following Being Moved To A Grazing Situation, G.A. Perry, E.L. Larimore, J.A. Walker
Walking Distance And Performance Of Drylot Developed Beef Heifers Following Being Moved To A Grazing Situation, G.A. Perry, E.L. Larimore, J.A. Walker
South Dakota Beef Report, 2013
Research has shown that heifers moved from a drylot to grass after AI have decreased weight gains and pregnancy success compared to heifers developed on range. This effect could potentially be due to inexperience in a specific grazing environment, which could result in greater time spent exploring a new environment. In this study beef heifers were moved from a drylot to spring grass at two different times and their activity compared. Heifers in a drylot walked less than heifers grazing spring forage. However, following being moved to spring forage heifers that had been adjusted to grass for about a month …
The Effect Of Handler Personality Type On Feedlot Cattle Behavioral Responses, H. Franzky, R. Pritchard, J. Trenhaile
The Effect Of Handler Personality Type On Feedlot Cattle Behavioral Responses, H. Franzky, R. Pritchard, J. Trenhaile
South Dakota Beef Report, 2013
The ability to readily identify individuals that may have a greater innate ability to handle cattle in a low stress manner would be useful in feedlots and on ranches. This study was conducted to determine whether handler personality type would be a useful tool to predict stockman abilities. To accomplish this, 3 cattle handling exercises were created to observe human‐cattle interactions. A scoring system was developed to investigate cattle handling proficiency based on cattle behavioral responses. Handler personality type was classified using two assessments. Some cattle handling exercises did not differentiate handler personality types. Introverted handlers tended to have higher …
Comparison Of Two Different Methods To Harvest Drought‐Damaged Corn, W.C. Rusche, J.A. Walker
Comparison Of Two Different Methods To Harvest Drought‐Damaged Corn, W.C. Rusche, J.A. Walker
South Dakota Beef Report, 2013
Two methods of harvesting drought‐stressed corn as large round bales were compared in this study. Three acres of drought‐stressed corn were cut and either baled as high‐moisture bales and wrapped in plastic (BALEAGE), or allowed to completely dry and baled with a conventional large round baler (DRY). Core samples were analyzed for moisture, CP, ADF, NDF and in vitro NDF and DM digestibility. Samples from the BALEAGE treatment were lower in CP than those from the DRY treatment. Concentrations of ADF and NDF did not differ between BALEAGE and DRY. Dry matter and NDF digestibility were also similar between the …
Nitrogen Excretion From Beef Cattle For 6 Cover Crop Mixes As Estimated By A Nutritional Model, E.E. Grings, A. Sackey, M. Hansen, V. Owens, D. Beck, P. Sexton
Nitrogen Excretion From Beef Cattle For 6 Cover Crop Mixes As Estimated By A Nutritional Model, E.E. Grings, A. Sackey, M. Hansen, V. Owens, D. Beck, P. Sexton
South Dakota Beef Report, 2013
Excretion of nitrogen (N) from cattle within crop‐livestock systems is an important component of nutrient cycling, but measuring fecal and urinary N excretion in grazing cattle is a difficult and time consuming task. Nutritional models are available to estimate feed utilization and have been used to predict N excretion in grazing cattle. Using the Large Ruminant Nutrition Model, we predicted N losses from mature pregnant beef cows and growing beef heifers from compositional analysis of cover crop mixes grown in central South Dakota. All of the mixes used contained crude protein (CP) concentrations greater than cattle requirements. Estimates of both …
The Influence Of Maternal Energy Status During Mid‐Gestationon Beef Offspring Carcass Characteristics And Meat Quality, D. A Mohrhauser, A.R. Taylor, K.R. Underwood, R.H. Pritchard, A.E. Wertz-Lutz, A.D. Weaver
The Influence Of Maternal Energy Status During Mid‐Gestationon Beef Offspring Carcass Characteristics And Meat Quality, D. A Mohrhauser, A.R. Taylor, K.R. Underwood, R.H. Pritchard, A.E. Wertz-Lutz, A.D. Weaver
South Dakota Beef Report, 2013
Research has suggested that maternal under‐nutrition may cause the development of a thrifty phenotype in the offspring, potentially resulting in greater adiposity and reduced muscle mass. These alterations in fat and muscle development could have lasting impacts on offspring growth, carcass characteristics, and meat quality. Thus, the objective of this study was to determine the influence of maternal energy status during mid‐gestation on offspring carcass characteristics and meat quality. To alter maternal energy status, cows either grazed pasture or were fed in a dry‐lot at 80% of the energy requirements for body weight maintenance during a mean period of 109 …
2013 South Dakota Beef Report, Department Of Animal Sciences, South Dakota State University, Agricultural Experiment Station, South Dakota State University, Cooperative Extension Service, South Dakota State University
2013 South Dakota Beef Report, Department Of Animal Sciences, South Dakota State University, Agricultural Experiment Station, South Dakota State University, Cooperative Extension Service, South Dakota State University
South Dakota Beef Report, 2013
This is the 2013 South Dakota Beef Report produced by the SDSU Department of Animal Sciences in conjunction with the Agricultural Experiment Station , and the SDSU Cooperative Extension. The articles published in this report summarize many of the beef cattle research activities conducted at South Dakota State University during 2013. The articles in this report have many levels of application. Some information has immediate application for your farm, ranch, or agribusiness. The articles include information on nutrition,management, health, growth and development, and economics of the cattle and beef industry in South Dakota.
The Influence Of Growth Stage On Carcass Compositionand Factors Associated With Marbling Development In Beef Cattle, S.A. Kern, R.H. Pritchard, S.M. Scramlin, B.P. Holland, A.D. Blair, K.R. Underwood
The Influence Of Growth Stage On Carcass Compositionand Factors Associated With Marbling Development In Beef Cattle, S.A. Kern, R.H. Pritchard, S.M. Scramlin, B.P. Holland, A.D. Blair, K.R. Underwood
South Dakota Beef Report, 2013
There are many cellular regulatory factors that ultimately determine the intramuscular fat, or marbling content and quality of beef carcasses. Identifying factors which play a critical role in the development of intramuscular fat throughout the feeding period and determining how cattle feeders can manipulate these factors will be crucial to continue improving beef quality. Ideally, marbling must increase without excess accumulation of adipose in depots that are undesirable and economically detrimental (subcutaneous and visceral). The results of this study are novel as they show not only what cellular factors play a role in marbling development, but also how their expression …