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Darrh Bullock


ID-263

Alternative Protein Sources for Cattle

7/2/2020 (new)
Authors: Les Anderson, Darrh Bullock, Darrell Johnson, Kevin Laurent, Jeff Lehmkuhler, Katherine VanValin

Kentucky has several bourbon distilleries and one fuel ethanol plant. The spent grains from the production of ethanol is utilized as a protein source in livestock feed. Shutdowns for fuel ethanol plants may also occur as a result of unfavorable profit margins when crude oil prices are low. Most distilleries and fuel ethanol plants will have a scheduled maintenance shutdown each year. During a shutdown, availability of distillers grains and other coproducts from these plants may be limited or unavailable. So, the question is what else can I feed in place of distillers grains?

Departments: Animal and Food Sciences, Regulatory Services
Series: Interdepartmental (ID series)
Tags: beef cattle, livestock, nutrition and health
Size: 300 kb
Pages: 2



ASC-244

Feeding Distillery Stillage to Beef Cattle

6/1/2020 (new)
Authors: Les Anderson, Darrh Bullock, Kevin Laurent, Jeff Lehmkuhler

The growth of the bourbon industry has provided an increase in distillery byproduct feedstuffs that can be utilized by cattle as a source of energy and protein. Learning the nutritional characteristics of these feedstuffs will facilitate proper feeding, allowing for improved cattle performance.

Departments: Animal and Food Sciences
Series: Animal Science (ASC series)
Tags: beef cattle, livestock
Size: 130 kb
Pages: 3



ID-258

Weaning Beef Calves

9/17/2019 (new)
Authors: Les Anderson, Michelle Arnold, Darrh Bullock, Jeff Lehmkuhler

Weaning is the process of separating suckling offspring from their dam. Weaning is a management procedure applied by the herd manager. Cattle are herd animals and their gregarious nature can lead to stress as a result of this separation. Managing the weaning process can aid in reducing stress for the animals and livestock managers.

Departments: Animal and Food Sciences, Veterinary Science
Series: Interdepartmental (ID series)
Tags: beef cattle, livestock
Size: 821 kb
Pages: 4



ASC-211

Expected Progeny Differences: Trait Definitions and Utilizing Percentile Tables

2/7/2014 (new)
Authors: Sean Bessin, Darrh Bullock

Expected progeny differences (EPDs) are useful tools in providing the best estimate of the genetic value of a particular animal as a parent. Differences in EPDs between parents of the same breed predict the performance differences of their future offspring if environmental factors are the same. EPD values should not be compared between breeds; for example, you should not compare an Angus bull's weaning weight EPD with a Simmental bull's weaning weight EPD. Most established breeds have EPDs for calving ease, growth, maternal, and carcass traits. When used properly, producers can make genetic improvements to their herd through parental selection. This publication is intended to help producers better understand EPDs and how one might use them in selection of replacement animals.

Departments: Animal and Food Sciences
Series: Animal Science (ASC series)
Tags:
Size: 370 kb
Pages: 3



SR-105

2012 Beef Research and Extension Report

1/7/2014 (new)
Authors: Glen Aiken, Les Anderson, Darrh Bullock, Roy Burris, Lowell Bush, J.R. Bussard, Andrew Foote, Ben Goff, David Harmon, V.B. Holder, Isabelle Kagan, Nicole Kenney, D.H. Kim, S.E. Kitts, Jim Klotz, Anne Koontz, Jeff Lehmkuhler, Kyle McLeod, Jim Strickland, Eric Vanzant, Bill Witt

The intent of this report is to provide highlights of our research and extension activities. We have a vested interest in the beef industry in the state and nation, and hope this report provides a window into our programs. We believe that after viewing this report, a greater appreciation will be garnered with respect to our involvement in the multiple fields of study related to beef production. The faculty, staff and student activities are advancing our understanding of basic science principles of livestock production as well as applied research that producers and the industry can benefit from immediately, as well as in the future. Extension educational programs, on-farm demonstrations, and other activities aid in transferring this knowledge to producers, allowing for increased awareness and adoption of management change.

Departments: Animal and Food Sciences, Plant and Soil Sciences, USDA-ARS
Series: Special Report (SR series)
Tags:
Size: 975 kb
Pages: 40



SR-104

2010 Research and Extension Beef Report

3/11/2011 (new)
Authors: Les Anderson, Darrh Bullock, Roy Burris, Lowell Bush, Blair Knight, Kevin Laurent, Jeff Lehmkuhler, Jim Matthews, Kyle McLeod, Lori Porter, Jim Randolph, Gregg Rentfrow, Keith Schillo, Meg Steinman, Jim Strickland, Laurentia van Rensburg, Eric Vanzant

The 2010 Research and Extension Beef Report highlights advances in understanding of basic scientific principles of livestock production as well as applied research from which producers and the industry can benefit. Extension educational programs, on-farm demonstrations, and other activities help transfer this knowledge to producers so they can adopt of management changes as appropriate.

Departments: Animal and Food Sciences, Plant and Soil Sciences, UK Veterinary Diagnostic Lab, USDA-ARS
Series: Special Report (SR series)
Tags:
Size: 2.10 mb
Pages: 89



ASC-141

Using Expected Progeny Differences

2/10/2011 (major revision)
Authors: Darrh Bullock

One of the most important decisions a cattle operator makes is selecting breeding animals to go into the cattle herd. Basing that decision on the genetic merit of the animal, not just the outward appearance, is critical to the herd's long-term performance.

Departments: Animal and Food Sciences
Series: Animal Science (ASC series)
Tags:
Size: 248 kb
Pages: 4



ASC-169

Beef Sire Selection Manual

5/28/2010 (major revision)
Authors: Darrh Bullock

In principle, genetic improvement is a straight-forward exercise that results from using above-average selection candidates as the parents of the next generation. In practice, the devil is in the details. Both bull breeders and bull buyers need to consider their breeding objectives, defining the list of traits that need to be modified to advance the towards their goal.

Departments: Animal and Food Sciences
Series: Animal Science (ASC series)
Tags:
Size: 2.14 mb
Pages: 89



ASC-168

Crossbreeding for the Commercial Beef Producer

11/1/2004 (new)
Authors: Les Anderson, Darrh Bullock

Departments: Animal and Food Sciences
Series: Animal Science (ASC series)
Tags:
Size: 442 kb
Pages: 5



SR-2004-2

2003 Research and Extension Beef Report

6/1/2004 (new)
Authors: Jim Akers, Les Anderson, Darrh Bullock, Kenny Burdine, Roy Burris, Paul Deaton, David Harmon, Bruce Hightshoe, John Johns, Jim Matthews, Kyle McLeod, Lee Meyer, Melissa Newman, Jim Randolph, Patty Scharko, Keith Schillo, Alison Smith, Laurentia van Rensburg, Eric Vanzant

Departments: Agricultural Economics, Agriculture and Natural Resources, Animal and Food Sciences, Veterinary Science
Series: Special Report (SR series)
Tags:
Size: 481 kb
Pages: 43



ASC-165

Beef Sire Selection Recommendations

12/22/2003 (new)
Authors: Les Anderson, Darrh Bullock, Roy Burris, John Johns

Departments: Animal and Food Sciences
Series: Animal Science (ASC series)
Tags:
Size: 86 kb
Pages: 2



ASC-144

Managing Considerations in Beef Heifer Development

2/1/2003 (reprinted)
Authors: Darrh Bullock, Roy Burris, John Johns, Dave Patterson

Departments: Animal and Food Sciences
Series: Animal Science (ASC series)
Tags:
Size: 320 kb
Pages: 4



ASC-162

Managing Body Condition to Improve Reproductive Efficiency in Beef Cows

2/1/2003 (reprinted)
Authors: Les Anderson, Darrh Bullock, Roy Burris, John Johns

Departments: Animal and Food Sciences
Series: Animal Science (ASC series)
Tags: nutrition and health
Size: 158 kb
Pages: 6



ASC-163

Strategies to Improve Reproductive Efficiency of Heifers

2/1/2003 (reprinted)
Authors: Les Anderson, Darrh Bullock, Roy Burris, John Johns

Departments: Animal and Food Sciences
Series: Animal Science (ASC series)
Tags:
Size: 23 kb
Pages: 2



ASC-164

Protocols for Synchronizing Estrus in Yearling Heifers

2/1/2003 (reprinted)
Authors: Les Anderson, Darrh Bullock, Roy Burris, John Johns

Departments: Animal and Food Sciences
Series: Animal Science (ASC series)
Tags:
Size: 66 kb
Pages: 4



PR-463

Beef Research Report-2002

9/30/2002 (new)
Authors: Darrh Bullock

Departments: Animal and Food Sciences
Series: Progress Report (PR series)
Tags:
Size: 519 kb
Pages: 54



ASC-159

Selection and Management Practices to Increase Consistency in Beef Cattle

9/30/2000 (new)
Authors: Darrh Bullock

Departments: Animal and Food Sciences
Series: Animal Science (ASC series)
Tags: nutrition and health
Size: 78 kb
Pages: 4



ASC-142

Pelvic Measurements and Calving Difficulty

6/1/2000 (minor revision)
Authors: Les Anderson, Darrh Bullock

Departments: Animal and Food Sciences
Series: Animal Science (ASC series)
Tags:
Size: 243 kb
Pages: 3



PR-417

2000 Kentucky Beef Cattle Research Report

10/1/1999 (new)
Authors: Debra Aaron, Les Anderson, Darrh Bullock, Roy Burris, Dwayne Edwards, Don Ely, Bob Harmon, Jimmy Henning, Bruce Hightshoe, Terry Hutchens, John Johns, Garry Lacefield, Kevin Laurent, Jim Matthews, Kyle McLeod, Jim Randolph, Monroe Rasnake, Patty Scharko, Keith Schillo, Scott Shearer, Larry Turner, Dwight Wolfe, Steve Workman

Departments: Animal and Food Sciences, Biosystems and Agricultural Engineering, Horticulture, Plant and Soil Sciences, Veterinary Science
Series: Progress Report (PR series)
Tags:
Size: 4 kb
Pages:



ASC-153

Boar Selection: Using Expected Progeny Differences (EPDs)

7/30/1998 (new)
Authors: Darrh Bullock, Richard Coffey, Kevin Laurent, Gary Parker

Departments: Animal and Food Sciences
Series: Animal Science (ASC series)
Tags:
Size: 14 kb
Pages:



ASC-150

Keeping Production Records for the Beef Herd

3/30/1996 (reprinted)
Authors: Darrh Bullock, Kevin Laurent

Departments: Animal and Food Sciences
Series: Animal Science (ASC series)
Tags:
Size: 145 kb
Pages: 2