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2003

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Articles 241 - 270 of 602

Full-Text Articles in Animal Sciences

Explanation Of Statistics Used In This Report Jan 2003

Explanation Of Statistics Used In This Report

Nebraska Swine Reports

Pigs treated alike vary in performance due to their different genetic makeup and to environmental effect we cannot completely control. When a group of pigs is randomly allotted to treatments it is nearly impossible to get an “equal” group of pigs on each treatment. The natural variability among pigs and the number of pigs per treatment determine the expected variation among treatment groups due to random sampling.

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Effect Of A Low Phytate, Nutrient Dense Corn On Pig Performance, Mike Brumm Jan 2003

Effect Of A Low Phytate, Nutrient Dense Corn On Pig Performance, Mike Brumm

Nebraska Swine Reports

An experiment was conducted to determine the effects of a low phytate, nutrient dense corn variety on pig performance, fecal phosphorus and fecal nitrogen. Experimental treatments were: 1) corn-soybean meal diets formulated with purchased yellow corn; 2) similar diets formulated with 500 FTU/kg phytase; 3) diets formulated with a nutrient dense corn variety having a reduced phytic acid, elevated lysine, and higher energy compared to yellow corn; and 4) diets formulated with the nutrient dense corn variety and phytase at 500 FTU/kg to 130 lb BW and blended with yellow corn thereafter based on estimated available phosphorus. There was no …

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Agricultural Management Advisory Groups For Pork Producers, Allen Prosch Jan 2003

Agricultural Management Advisory Groups For Pork Producers, Allen Prosch

Nebraska Swine Reports

Pork producers face complex management decisions and they need assistance with this complexity. Pork producers need to increase their awareness of the value of intangible assets such as relationships and knowledge. Pork producers must value, employ, and extract value from the use of intangible assets. Agricultural management advisory services assist producers in extracting vale from the use of intangible assets such as knowledge. Pork producers need to participate in advisory services. Pork producers can use group efforts to effectively create such services. Advisory services can improve the well being of producers by increasing their knowledge of and ability to deal …

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Effect Of Post-Cooking Holding Time On Consumer Taste Panel Ratings Of Enhanced Pork Loins, Christian Perversi, Chris R. Calkins, Kent M. Eskridge Jan 2003

Effect Of Post-Cooking Holding Time On Consumer Taste Panel Ratings Of Enhanced Pork Loins, Christian Perversi, Chris R. Calkins, Kent M. Eskridge

Nebraska Swine Reports

Sensory evaluation of food products is a valuable means of learning about their characteristics. Consumer taste panels are regularly used to evaluate properties of meat products such as pork loins. The objective of this research was to evaluate the effect of post-cooking holding time on the taste panel ratings of enhanced pork. The loins used in this project were enhanced with varying percentages (close to 10%) of solutions containing water, salt, phosphates and natural juices or flavors. The loins came from 10 different suppliers and were served in randomly allotted groups of seven, throughout twenty, one-hour taste panel sessions. The …

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The Economic Potential Of Methane Recovery: Projected Impacts Of Various Public-Policy Scenarios, Richard R. Stowell, Christopher G. Henry Jan 2003

The Economic Potential Of Methane Recovery: Projected Impacts Of Various Public-Policy Scenarios, Richard R. Stowell, Christopher G. Henry

Nebraska Swine Reports

Economic analyses were performed on anaerobic digestion of manure from swine finishing operations. The main factors considered were facility size (1,000 head; 3,500 head; and 10,000 head) and method of financial support provided (cost-share program, no-interest loans, tax subsidies, and subsidized electrical sales). Installation of a digester system is a significant investment that is currently very difficult to justify economically to Nebraska producers based upon consideration of currently available income and expense estimates, regardless of facility size. Swine finishing operations looking to invest in this technology would benefit most from a no-interest loan or cost-share program – policies that relate …

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Omega-3 Fatty Acids And Swine Reproduction - A Review, Duane Reese Jan 2003

Omega-3 Fatty Acids And Swine Reproduction - A Review, Duane Reese

Nebraska Swine Reports

A literature review was conducted to examine the role dietary omega-3 fatty acids may play in swine reproduction. Omega-3 fatty acids are not normally present to any great extent in practical swine diets, but they are increasingly important in human and pet health. Swine nutritionists have focused primarily on the effect omega-3 fatty acids may have on littler size, piglet preweaning mortality, and boar fertility. Feeding omega-3 fatty acids to sows has not generally improved litter size. Piglet preweaning mortality may be improved by omega-3 fatty acid supplementation provided sows are allowed to farrow naturally (without induction). Boar fertility seems …

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Animal Science Alumni Newsletter, Winter 2003 Jan 2003

Animal Science Alumni Newsletter, Winter 2003

Department of Animal Science: Departmental News

Contents:

Tribute to R. B. “Dick” Warren, A Study in True Grit
From the Department Head’s Desk
Department of Animal Science Loses a Good Friend
Klopfenstein Fund to Benefit Animal Science Students
Faculty Retirement
Awards
Block and Bridle Convention
Block and Bridle Kids Day
Block and Bridle Steak Fry
Spring 2004 Block and Bridle Calendar
Ambassador Activities
Animal Science Overnight Recruits New Students
Recent Department Awards and Recognitions
Judging Team Activities
Academic Quadrathlon
Deaths
E. coli Research
Nebraska Beef Youth Leadership Symposium Planned
Woman Combines Ag Passion and Writing
Husker Hire Link
Study Tour to Denmark
New Study Abroad Program …

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Animal Science Alumni Newsletter, Winter 2003 Jan 2003

Animal Science Alumni Newsletter, Winter 2003

Department of Animal Science: Departmental News

Contents:L

Tribute to R. B. “Dick” Warren, A Study in True Grit
From the Department Head’s Desk
Department of Animal Science Loses a Good Friend
Klopfenstein Fund to Benefit Animal Science Students
Faculty Retirement
Awards
Block and Bridle Convention
Block and Bridle Kids Day
Block and Bridle Steak Fry
Spring 2004 Block and Bridle Calendar
Ambassador Activities
Animal Science Overnight Recruits New Students
Recent Department Awards and Recognitions
Judging Team Activities
Academic Quadrathlon
Deaths
E. coli Research
Nebraska Beef Youth Leadership Symposium Planned
Woman Combines Ag Passion and Writing
Husker Hire Link
Study Tour to Denmark
New Study Abroad Program …

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Growth And Carcass Characteristics In Wether Lambs Of A Crossbred Dam Line, A. M. Van Heelsum, R. M. Lewis, M. H. Davies, W. Haresign Jan 2003

Growth And Carcass Characteristics In Wether Lambs Of A Crossbred Dam Line, A. M. Van Heelsum, R. M. Lewis, M. H. Davies, W. Haresign

Department of Animal Science: Faculty Publications

While crossing of specialized sire and dam breeds can be biologically efficient overall, a by-product is produced in the form of (crossbred) males of the dam line that are unwanted for breeding. In the UK sheep indusiru, most commercial females are first crosses between males of 'longwool' crossing sire breeds, predominantly the Biuefaced Leicester, and females of hill breeds. Genetic improvement of carcass quality in longwool breeds would benefit the surplus F1males as well asfilter through to tile terminal sire cross lambs produced by the F1ewes. As afirst step, this paper aims to describe thegrowth and …

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Dna Sequence Of Melanocortin 1-Receptor Gene In Coturnix Japonica: Correlation With Three E Locus Alleles, E, E+, Erh, Rupali B. Ugrankar Jan 2003

Dna Sequence Of Melanocortin 1-Receptor Gene In Coturnix Japonica: Correlation With Three E Locus Alleles, E, E+, Erh, Rupali B. Ugrankar

Inquiry: The University of Arkansas Undergraduate Research Journal

The melanocortin 1-receptor (MC1-R) gene plays a key role in the expression of fur and feather color in mammals and birds by regulating the distribution of two melanin pigments: eumelanin (black/brown) and pheomelanin (red/yellow). MC1-R corresponds to the classical Extension (E) locus in mice, pigs, dogs, horses, and chickens. Three E locus alleles, the wild-type (e + ), brown (E), and redhead (e rh) have been identified in Japanese quail (Coturnix japonica). To determine if the quail E locus phenotypes were due to variation in the MC1-R gene, the coding region of the MC1-R gene was PCR amplified and DNA …

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Varriation Of Growth Rates In Yellow-Bellied Marmots, Carmen M. Salsbury, K. B. Armitage Jan 2003

Varriation Of Growth Rates In Yellow-Bellied Marmots, Carmen M. Salsbury, K. B. Armitage

Scholarship and Professional Work - LAS

Growth rates of yellow-bellied marmot (Marmota flaviventris) populations over a 32-year period (1965 -1996) varied Significantly with sex, age, location, and year. Overall, males had higher growth rates than females and young and yearlings generally had higher growth rates compared to adults at all locations. The locations varied with respect to elevation and the relationship between elevation and growth rate was complex and likely weather dependent. Low rainfall in late summer was often associated with low growth rates at high elevations where the active season is constrained and delayed by late spring snowmelt compared to low elevations. Growth rates and …

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Seasonal Body Temperature Fluctuations And Energetic Strategies In Free-Ranging Eastern Woodchucks, Carmen M. Salsbury Jan 2003

Seasonal Body Temperature Fluctuations And Energetic Strategies In Free-Ranging Eastern Woodchucks, Carmen M. Salsbury

Scholarship and Professional Work - LAS

During a 2-year period, radiotelemetry was used to continuously monitor body temperature ( T b) of free-ranging woodchucks (Marmota monax) in southeastern Pennsylvania. Hibernation was preceded by daily T b fluctuations ("test drops") of 2-4°C. During hibernation, woodchucks exhibited the characteristic pattern of torpor bouts. Time of arousals occurred randomly, but onset of torpor occurred predominantly between 1800 and 0000 h. Males had shorter hibernation periods (mean of 104.8 days) than did females (121.8 days). Males had shorter torpor bouts, but euthermic bouts were the same length as in females. Males also maintained higher T b during torpor. Overall, the …

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Relationships Of Chute-Side Measurements To Carcass Measurements, James C. Macdonald, Terry J. Klopfenstein, Galen E. Erickson, Casey Macken, Jeffrey Folmer Jan 2003

Relationships Of Chute-Side Measurements To Carcass Measurements, James C. Macdonald, Terry J. Klopfenstein, Galen E. Erickson, Casey Macken, Jeffrey Folmer

Nebraska Beef Cattle Reports

Three data sets were compiled to determine the relationship of weight, performance, hip height and ultrasound-measured fat thickness to hot carcass weight and fat thickness. Weight is generally the best predictor of relative differences in carcass weight at any time in the production system. Hip heights do not predict relative differences in carcass weight. Although the combination of hip height and weight is a more precise indicator of carcass weight than is hip height alone, generally this combination is inferior to weight alone. Only ultrasound-measured fat thickness predicted relative differences in fat thickness. Prediction of relative differences in carcass weight …

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2003 Beef Cattle Report Jan 2003

2003 Beef Cattle Report

Nebraska Beef Cattle Reports

Entire issue. 92 pages.

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Evaluation Of Cow And Calf Performance And Profit Potential In Beef Systems, Rosemary Anderson, Richard J. Rasby, Terry J. Klopfenstein, Casey Macken Jan 2003

Evaluation Of Cow And Calf Performance And Profit Potential In Beef Systems, Rosemary Anderson, Richard J. Rasby, Terry J. Klopfenstein, Casey Macken

Nebraska Beef Cattle Reports

A three-year experiment was conducted to determine the production efficiencies of two beef systems. Spring-calving, crossbred cows were either wintered on pasture (Control System) or on corn stalks (Treatment System). Control System steers were transported to a feedlot, fed a finishing diet and harvested. Treatment System steers were wintered on corn stalks, grazed pasture, fed a finishing diet, and harvested. Cow weights and condition differed but pregnancy rates were similar. Control System steers spent more days in the feedlot, had lower feed conversions and higher marbling scores. Treatment System steers had higher average daily gains and produced heavier carcasses.

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Ingredient Opportunities For Case-Ready Beef, Mike Baczwaski, Roger W. Mandigo Jan 2003

Ingredient Opportunities For Case-Ready Beef, Mike Baczwaski, Roger W. Mandigo

Nebraska Beef Cattle Reports

Case-ready beef products have grown at a tremendous rate since the early large scale introductions in the mid 1990’s. Estimates exceed 9 billion pieces in the near future, up from 500 million in 1997 and 1.2 billion in 2000. The key producers of case-ready beef products are fresh-meat processors and retailer co-packers and the list continues to grow rapidly. Justification for producers and consumers includes better-in-stock at retail or less out-of-stock on a 24-hour basis, labor availability at retail level, less shrink, greater cost savings, and most importantly consumer satisfaction, consistency, tenderness, juiciness and improved food safety.

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The Effects Of Tumbler Volume On Roasted Beef Quality, Mike Baczwaski, Roger W. Mandigo, Jesus Velazco Jan 2003

The Effects Of Tumbler Volume On Roasted Beef Quality, Mike Baczwaski, Roger W. Mandigo, Jesus Velazco

Nebraska Beef Cattle Reports

Semitendinosus beef muscles (n = 108) were used to determine optimum tumbler volume with regards to meat quality. Fill capacity of 2/3 meat had lower shear force values than capacities of 1/2 (P = 0.02) and 1/3 (P < 0 .01). Texture profile analysis showed favorable results among treatments. Hardness was lower with 2/3 capacity than 1/2 (P = 0.02) and 1/3 (P = 0.06). Gumminess favored 2/3 capacity over 1/2 (P = 0.02). Springiness favored 1/2 capacity over 1/3 capacity (P < 0.01) and 2/3 capacity (P=0.04). Purge, absorption rate during tumbling, absorption rate after rest, cooking loss and yield had no effect between treatments.

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Quality Traits Of Grain- And Grass-Fed Beef: A Review, Perry Brewer, Chris R. Calkins Jan 2003

Quality Traits Of Grain- And Grass-Fed Beef: A Review, Perry Brewer, Chris R. Calkins

Nebraska Beef Cattle Reports

Carcasses from grass-fed beef have lower fat thickness and lighter carcass weights, which increases the risk for cold shortening and reduces muscle proteolysis, both of which would reduce beef tenderness. A review of nine research papers indicates grass-fed beef is lower in tenderness (both from shear force and by taste panel), flavor and overall acceptability/desirability ratings.

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Carcass And Palatability Characteristics Of Calf-Fed And Yearling Finished Steers, Perry Brewer, Rosemary Anderson, Chris R. Calkins, Terry J. Klopfenstein, Richard J. Rasby Jan 2003

Carcass And Palatability Characteristics Of Calf-Fed And Yearling Finished Steers, Perry Brewer, Rosemary Anderson, Chris R. Calkins, Terry J. Klopfenstein, Richard J. Rasby

Nebraska Beef Cattle Reports

Steers finished in two management systems were used to compare carcass and palatability characteristics. Calves (n=34) were finished on a high concentrate diet for 203 days. Yearlings (n=42) grazed forages followed by 93 days on a high concentrate diet. Calves had higher marbling scores, lower shear force values and higher sensory ratings for tenderness, flavor and overall acceptability. Compared at equal marbling scores, calves had lower shear force values and higher sensory ratings for tenderness and overall acceptability. The risk of steaks being classified as “tough” was higher in yearlings, but relatively low, especially at extended aging times.

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Adjustments For Wind Speed And Solar Radiation To The Temperature-Humidity Index, Shane Davis, Terry L. Mader Jan 2003

Adjustments For Wind Speed And Solar Radiation To The Temperature-Humidity Index, Shane Davis, Terry L. Mader

Nebraska Beef Cattle Reports

Data from three separate feedlot finishing trials were combined into one data set to determine wind speed and solar radiation adjustments to the temperature- humidity index equation based on degree of panting and ambient environmental conditions. Regression equations were used to determine the relationship between observed panting and current temperature-humidity index, wind speed and solar radiation for developing correction factors. Based on these calculations, for each 1 mile/ hour increase in wind speed, THI should be decreased approximately 1 unit, and for each 3 Langley increase in solar radiation or 10% increase in cloud cover, THI should be decreased approximately …

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Carbon Sequestration Following Beef Cattle Feedlot Manure, Compost, And Fertilizer Applications, Bahman Eghball, Daniel Ginting Jan 2003

Carbon Sequestration Following Beef Cattle Feedlot Manure, Compost, And Fertilizer Applications, Bahman Eghball, Daniel Ginting

Nebraska Beef Cattle Reports

Manure or compost application can increase carbon (C) sequestration in the soil since these organic sources contain significant amounts of C, which is a major constituent of soil organic matter. An experiment was conducted from 1992 to 1996 to evaluate the effects of annual or biennial N- and P-based manure or composted manure application on soil C sequestration. Fertilized and unfertilized checks were also included. About 25% of applied manure C and 36% of applied compost C remained in the surface (0-6 inch) soil after four years of application, indicating greater C sequestration with composted than noncomposted manure. Soil C …

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Evaluation Of Buffering Agents In Feedlot Diets For Cattle, Travis Farran, Galen E. Erickson, Terry J. Klopfenstein Jan 2003

Evaluation Of Buffering Agents In Feedlot Diets For Cattle, Travis Farran, Galen E. Erickson, Terry J. Klopfenstein

Nebraska Beef Cattle Reports

Six ruminally cannulated heifers were used in a 6 x 6 Latin square to determine effects of Acid Buf, sodium bicarbonate and Rumensin on severity of acidosis and feeding behavior when fed to cattle consuming high grain finishing diets. Heifers received diets containing no added buffer, Acid Buf at 0.75% or 1.25% DM, sodium bicarbonate at 1.25% DM, 28 grams/ton Rumensin, or 28 grams/ton Rumensin + 0.75% DM Acid Buf. Heifers were adapted to dietary treatments 9 days before a 5-day data collection period. Animals fed Acid Buf and sodium bicarbonate had a higher average ruminal pH. Feeding Rumensin and …

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Intervention Strategies For Reduction Of E. Coli O157:H7 In Feedlot Steers, Jeffrey Folmer, Casey Macken, Galen E. Erickson, Terry J. Klopfenstein, Mindy Brashears, Rodney A. Moxley, David R. Smith, Suzanne Hinkley Jan 2003

Intervention Strategies For Reduction Of E. Coli O157:H7 In Feedlot Steers, Jeffrey Folmer, Casey Macken, Galen E. Erickson, Terry J. Klopfenstein, Mindy Brashears, Rodney A. Moxley, David R. Smith, Suzanne Hinkley

Nebraska Beef Cattle Reports

Two experiments were conducted to evaluate the effects of three intervention strategies on the prevalence of E. coli O157:H7 in feedlot steers. In both experiments, 432 steers were assigned to one of 54 pens. Intervention strategies were two competitive exclusion products, monthly pen cleaning. In Experiment 2 a diet change treatment was imposed prior to slaughter. No differences in performance or carcass yield were observed for the competitive exclusion products or the pen cleaning treatments, compared to the control. However, changing the finishing diet prior to slaughter decreased steer performance. We also observed a nonsignificant decrease in the prevalence of …

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Impact Of Manure Application On Phosphorus In Surface Runoff And Soil Erosion, Christina Gossin, Gregory J. Teichmeier, Galen E. Erickson, Terry J. Klopfenstein, Daniel T. Walters Jan 2003

Impact Of Manure Application On Phosphorus In Surface Runoff And Soil Erosion, Christina Gossin, Gregory J. Teichmeier, Galen E. Erickson, Terry J. Klopfenstein, Daniel T. Walters

Nebraska Beef Cattle Reports

Effects of method of manure management and dietary P were compared on 21 natural runoff plots to monitor the long-term impact of dietary P to P losses in runoff and erosion. Reducing feed P resulted in a 33% reduction in manure P content and soil test P buildup and runoff losses of P also were directly proportional to feed P inputs. The timing and management of manure are also important considerations for controlling P losses in runoff in the year of application. However, residual effects of timing and management are probably small. Management criteria designed to assess the potential for …

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Summer Vs. Winter Growth Promotant Strategies For Intact Yearling Heifers, Wanda Kreikemeier, Terry L. Mader Jan 2003

Summer Vs. Winter Growth Promotant Strategies For Intact Yearling Heifers, Wanda Kreikemeier, Terry L. Mader

Nebraska Beef Cattle Reports

A winter and a summer trial were conducted to evaluate growth promoting strategies among season for yearling heifers fed feedlot finishing diets. Two hundred seventy Angus crossbred intact yearling heifers were used for each trial. Daily dry matter intake and daily water intake were recorded and average daily gain and feed efficiency were calculated. A growth promotant by season interaction was found for dry matter intake only. Performance was improved in both summer and winter when a growth promoting system was used. In the summer, adding melengestrol acetate to estrogenic and androgenic implants strategies tended to stimulate DMI, while in …

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Feeding Kelp Meal In Feedlot Diets, Wanda Kreikemeier, Terry L. Mader, Shane Davis, Dan Colling Jan 2003

Feeding Kelp Meal In Feedlot Diets, Wanda Kreikemeier, Terry L. Mader, Shane Davis, Dan Colling

Nebraska Beef Cattle Reports

Three trials were conducted to assess the effects of feeding kelp meal to feedlot cattle. In Trial 1, two commercial feedlots were utilized to determine the effects of kelp meal fed to finishing steers exposed to heat stress. Trial 2 was conducted to evaluate the effects of feeding kelp meal in receiving feedlot steer diets. Trial 3 assessed the effects of kelp meal on performance and carcass characteristics when finishing feedlot heifers were exposed to heat stress. Panting scores were reduced in commercial pens of cattle fed kelp meal while dry matter intakes were maintained. Water intake and dry matter …

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Estimation Of Rumen Undegradable Protein In Forages By Using Neutral Detergent Insoluble Nitrogen At A Single In Situ Incubation Time Point, Mariela Lamothe, Terry J. Klopfenstein Jan 2003

Estimation Of Rumen Undegradable Protein In Forages By Using Neutral Detergent Insoluble Nitrogen At A Single In Situ Incubation Time Point, Mariela Lamothe, Terry J. Klopfenstein

Nebraska Beef Cattle Reports

Neutral detergent insoluble nitrogen (NDIN) was used as a direct estimate of UIP. Forage samples collected from upland range and subirrigated meadow sites over the summer were incubated in situ for a time equivalent to a mean retention time estimated from the digestibility of the forage plus 10 hour to account for a lag in passage of particles from the rumen. Samples also were incubated for 75% of the estimated total mean retention time. The UIP values obtained from the fractional rates of degradation and passage were highly correlated with those estimated from samples incubated for 75% of total mean …

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Microbial Protein Production In Gestating Cows Supplemented With Different Sources Of Rumen Degradable Protein Grazing Dormant Range, Mariela Lamothe, Terry J. Klopfenstein, Don C. Adams, Jacqueline A. Musgrave, Galen E. Erickson Jan 2003

Microbial Protein Production In Gestating Cows Supplemented With Different Sources Of Rumen Degradable Protein Grazing Dormant Range, Mariela Lamothe, Terry J. Klopfenstein, Don C. Adams, Jacqueline A. Musgrave, Galen E. Erickson

Nebraska Beef Cattle Reports

Twenty-four gestating spring calving cows grazing dormant native range were used to determine the effect of two different sources of DIP supplementation in the winter. Supplementation treatments were: 1) supplement containing urea as a source of non-protein nitrogen, 2) corn gluten feed (CGF) as a source of true protein, and 3) no supplement . Forage intake was greater for cows supplemented with urea compared to no supplement, and forage intake tended be greater for cows supplemented with urea than CGF. Microbial protein (MCP) synthesis estimated from urinary excretion of allantoin was greater for cows receiving urea than CGF or no …

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Value Of Dry Distillers Grains In High-Forage Diets And Effect Of Supplementation Frequency, Tim Loy, Terry J. Klopfenstein, Galen E. Erickson, Casey Macken Jan 2003

Value Of Dry Distillers Grains In High-Forage Diets And Effect Of Supplementation Frequency, Tim Loy, Terry J. Klopfenstein, Galen E. Erickson, Casey Macken

Nebraska Beef Cattle Reports

An experiment was conducted with 120 crossbred heifers to determine the value of dry distillers grains (DDG) in high-forage diets, and to evaluate the effect of supplementing daily compared to three times weekly. Heifers were fed to consume grass hay ad libitum and supplemented with DDG, dry rolled corn (DRC), or DRC with corn gluten meal (DRC+CGM). Supplements were fed at two levels and offered either daily or three times per week in equal proportions. Heifers supplemented daily ate more hay, gained faster (1.37 vs. 1.24 lb per day), but were not more efficient than those supplemented on alternate days. …

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Sorting Strategies For Yearlings, James C. Macdonald, Terry J. Klopfenstein, Galen E. Erickson, Casey Macken, Jeffrey Folmer, Mark Blackford Jan 2003

Sorting Strategies For Yearlings, James C. Macdonald, Terry J. Klopfenstein, Galen E. Erickson, Casey Macken, Jeffrey Folmer, Mark Blackford

Nebraska Beef Cattle Reports

One hundred sixty medium-framed English-cross steers were used in each year of a two-year study to determine effects of three sorting strategies on performance, carcass characteristics and profitability in an extensive beef production system. Sorting by weight before the grazing period or entering the feedlot decreased variation in carcass weight. Sorting by weight before the grazing period increased marbling scores and resulted in significantly higher premiums. However, no sorting strategy significantly increased carcass weight or improved profitability.

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