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Articles 361 - 388 of 388
Full-Text Articles in Entire DC Network
Ksu Lean Gain Assessment Program (1991), G L. Keeler, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband
Ksu Lean Gain Assessment Program (1991), G L. Keeler, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband
Kansas Agricultural Experiment Station Research Reports
KSU Lean Gain Assessment is a new program developed at Kansas State University to allow producers to assess the actual lean gain of their pigs under normal farm conditions. The procedure is inexpensive and relatively simple and provides information that will assist producers in monitoring their genetic progress. Additionally, farm-specific diets can be formulated to match nutrient levels with the actual genetic potential of pigs on an individual farm.; Swine Day, Manhattan, KS, November 21. 1991
Causes Of Diarrhea, Pneumonia, And Septicemia In Swine For 1991 Submissions To The Ksu Veterinary Diagnostic Laboratory (1991), R K. Frank, M W. Vorhies
Causes Of Diarrhea, Pneumonia, And Septicemia In Swine For 1991 Submissions To The Ksu Veterinary Diagnostic Laboratory (1991), R K. Frank, M W. Vorhies
Kansas Agricultural Experiment Station Research Reports
Causes of pre- and postweaning diarrhea, pneumonia, and bacterial septicemia in pigs were summarized for fiscal year 1991 (July, 1990 to June, 1991) for submissions to the Kansas State University Veterinary Diagnostic Laboratory. Escherichia coli was the most common cause of both pre- and postweaning diarrhea in pigs (33.5% and 25.0%, respectively, of submissions for diarrhea). Other commonly diagnosed causes included transmissible gastroenteritis (24.4%) and coccidiosis (16.5%) for preweaning diarrhea, and proliferative enteritis (19.2 %) and salmonellosis (13.2 %) for postweaning diarrhea. The most commonly diagnosed causes of pneumonia in nursing, growing, and finishing pigs were Pasteurella multocida, Mycoplasma, and …
Effects Of Supplementation Of Nursery Diets With An Essential Fatty Acid On Immunity In Artificially Reared Pigs (1991), D S. Mcvey, G S. Elliot, G A. Kennedy, M M. Chengappa, N V. Anderson, D A. Schoneweis, M M. Hervey, S M. Cowan, Joe D. Hancock
Effects Of Supplementation Of Nursery Diets With An Essential Fatty Acid On Immunity In Artificially Reared Pigs (1991), D S. Mcvey, G S. Elliot, G A. Kennedy, M M. Chengappa, N V. Anderson, D A. Schoneweis, M M. Hervey, S M. Cowan, Joe D. Hancock
Kansas Agricultural Experiment Station Research Reports
Twenty four pigs were weaned immediately at farrowing, reared artificially for 21 d, and then used in a 35-d nursery experiment to determine the effects of essential fatty acid deficiency on immune function. Treatments were: 1) a semi-purified diet deficient in essential fatty acids and 2) diet 1 with 2% added linoleic acid. Conversion of linoleic acid to linolenic and then arachidonic acid is a normal step in fatty acid metabolism. Metabolites of arachidonic acid are thought to have a role in mediating immune function. On d 28 of the experiment, pigs were orally dosed with Salmonella choleraesuis to challenge …
The Influence Of Dietary Threonine On Growth Performance And Carcass Characteristics Of Pst-Treated Finishing Pigs (1991), J L. Laurin, J A. Hansen, B R. Schricker, Robert D. Goodband, Jim L. Nelssen
The Influence Of Dietary Threonine On Growth Performance And Carcass Characteristics Of Pst-Treated Finishing Pigs (1991), J L. Laurin, J A. Hansen, B R. Schricker, Robert D. Goodband, Jim L. Nelssen
Kansas Agricultural Experiment Station Research Reports
Eighty crossbred barrows (initial wt = 131 lb) were utilized to determine the dietary threonine requirement of finishing pigs injected with porcine somatotropin (PST). Barrows were injected daily in the extensor muscle of the neck with either 4 mg pST or a placebo and fed diets containing either .45, .55, .65, or .75% threonine. All other amino acids, vitamins, and minerals were calculated to be at least double current requirements for finishing pigs so as not to limit performance. Pigs were housed in an open-sided building with two pigs per pen and five replications of the eight treatments. Feed and …
The Influence Of Added Lysine During Lactation On Sow And Litter Performance (1991), J L. Laurin, R D. Richard, D R. Keesecker, Robert D. Goodband, Jim L. Nelssen
The Influence Of Added Lysine During Lactation On Sow And Litter Performance (1991), J L. Laurin, R D. Richard, D R. Keesecker, Robert D. Goodband, Jim L. Nelssen
Kansas Agricultural Experiment Station Research Reports
An on-farm field study utilizing 287 crossbred sows was conducted to investigate the influence of additional dietary lysine during lactation on sow and litter performance. At farrowing, sows were randomly assigned to one of two milo-soybean meal diets containing either .65% (13.5 % CP) or .85% lysine (16.3% CP). Average sow parity was 3.75, and sows on both treatments had a similar number of pigs born alive and similar pig and litter birth weights. All litters were equalized to approximately 9.5 pigs within 24 hours following farrowing, and average lactation length was 21 d. No treatment x parity interactions were …
Effects Of Daily Porcine Somatotropin Administration On The Lysine Requirement Of Growing Pigs (1991), G E. Fitzner, T L. Weeden, K G. Friesen, Robert H. Hines, Jim L. Nelssen, Robert D. Goodband, Donald H. Kropf, Joe D. Hancock
Effects Of Daily Porcine Somatotropin Administration On The Lysine Requirement Of Growing Pigs (1991), G E. Fitzner, T L. Weeden, K G. Friesen, Robert H. Hines, Jim L. Nelssen, Robert D. Goodband, Donald H. Kropf, Joe D. Hancock
Kansas Agricultural Experiment Station Research Reports
One-hundred twenty crossbred barrows initially weighing 68.7 lb were used to determine the lysine requirement of growing pigs injected with 5 mg/d porcine somatotropin (PST) during a 5-wk growth trial. Pigs received one of six levels of dietary lysine (.7, 1.1, 1.5, 1.9,2.3, or 2.7%) and were injected daily with either 5 mg pST or placebo. During the 5 wk trial, pST-injected pigs had increased average daily gain (ADG), decreased average daily feed intake (ADFI), and improved feed conversion (F/G) compared with placebo-injected pigs. With increasing dietary lysine, ADFI of pigs injected with both pST and placebo was reduced. Pigs …
Health Considerations For The Year 2000 (1991), J F. Connor
Health Considerations For The Year 2000 (1991), J F. Connor
Kansas Agricultural Experiment Station Research Reports
As the swine industry matures, profit margins will decrease. Control of the major factors affecting feed cost will drive the system. Upgrading or maintaining health will be a major emphasis, because disease agents and complexes affect growing-finishing performance. Many diseases, such as pneumonia caused by Actinobacillus (llaemophilus) pleuropneumonia and swine dysentery, dramatically affect growing-finishing performance. Diseases decrease average daily feed intake (ADFI) and increase feed per gain ratio (FIG) in many instances. At the same time, they increase input costs via treatments, vaccines, and feed additives. Historically, our control methods may have been successful on individual farms, but not across …
The Effects Of An "Ideal Protein" Lactation Diet On Sow And Litter Performance (1991), J L. Laurin, J A. Hansen, R D. Richards, C E. Huffman, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen
The Effects Of An "Ideal Protein" Lactation Diet On Sow And Litter Performance (1991), J L. Laurin, J A. Hansen, R D. Richards, C E. Huffman, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen
Kansas Agricultural Experiment Station Research Reports
Four hundred lactating sows were used to determine the influence of an ideal protein lactation diet on sow productivity. Sows were fed either a 15.8% crude protein, corn soybean meal, control diet or a 12.6% protein diet supplemented with synthetic amino acids to a 15.8% crude protein equivalent. Lactation diet had no influence on litter weaning wt (114.5 vs 114.7 lb), daily feed intake (12.5 vs 12.7 lb), pig survivability (92.3 vs 93.1 %), or sow backfat loss (.11 vs .12 in). However, sows fed the ideal protein diet lost more weight than sows fed the control diet (18.6 vs …
Comparison Of Conventional And Low-Inhibitor Soybeans With Different Heat Treatments And Lysine Concentrations In Diets For Finishing Pigs (1991), M A. Giesemann, B J. Healy, A J. Lewis, Joe D. Hancock
Comparison Of Conventional And Low-Inhibitor Soybeans With Different Heat Treatments And Lysine Concentrations In Diets For Finishing Pigs (1991), M A. Giesemann, B J. Healy, A J. Lewis, Joe D. Hancock
Kansas Agricultural Experiment Station Research Reports
Two experiments were conducted to determine the effects of gene expression for the Kunitz trypsin inhibitor, heat treatment, and concentration of lysine in the diet on nutritional value of soybeans for finishing pigs. In Experiment 1, 108 pigs (113 lb avg initial wt) were fed diets with two soybean cultivars (Williams 82 and Amsoy 71), with (+K) and without (-K) gene expression for the Kunitz trypsin inhibitor, subjected to three heat treatments (1/2-, 3/4-, and full-roasting). Nutritional value of the Williams 82 and Amsoy 71 cultivars was not different, but -K soybeans were superior to +K soybeans at all levels …
The Effect Of Supplemental Fat And Lysine On Finishing Pig Performance And Carcass Characteristics (1991), K G. Friesen, R C. Thaler, Robert D. Goodband, Jim L. Nelssen
The Effect Of Supplemental Fat And Lysine On Finishing Pig Performance And Carcass Characteristics (1991), K G. Friesen, R C. Thaler, Robert D. Goodband, Jim L. Nelssen
Kansas Agricultural Experiment Station Research Reports
One hundred and sixty pigs averaging 127.4 lb were used to determine the benefit of 5% supplemental fat and (or) .20% lysine on growth performance and carcass characteristics. The trial consisted of four treatments: 1) a .61 %, lysine milo-soybean meal control diet; 2) control + 5% fat; 3) control + .20% lysine; 4) control + 5% fat and .20% lysine. Lysine:metabolizable energy ratios were held constant at 1.91: 1 for treatments 1 and 2 and at 2.52: 1 for treatments 3 and 4. Pig weights and feed consumption were recorded every third wk to calculate average daily gain (ADG), …
Effects Of Porcine Somatotropin Dosage And Lysine Level On Growth Performance Of Growing Pigs (1991), G E. Fitzner, T L. Weeden, B R. Schricker, Robert H. Hines, Jim L. Nelssen, Robert D. Goodband, Joe D. Hancock
Effects Of Porcine Somatotropin Dosage And Lysine Level On Growth Performance Of Growing Pigs (1991), G E. Fitzner, T L. Weeden, B R. Schricker, Robert H. Hines, Jim L. Nelssen, Robert D. Goodband, Joe D. Hancock
Kansas Agricultural Experiment Station Research Reports
Eighty crossbred barrows initially weighing 70.5 lb were used in a 5 wk trial to determine the optimum dosage of porcine somatotropin (PST) required to promote maximum growth response in growing pigs fed diets containing either 1.0 or 2.0% lysine. Pigs received a daily injection of placebo or 2, 4, or 8 mg pST in combination with one of two experimental diets containing either 1.0 or 2.0% dietary lysine. Increasing the dosage of pST of pigs fed both diets resulted in an increase in average daily gain (ADG), a reduction in average daily feed intake (ADFI), and an improvement in …
One-Day Supplementation With Tyrosine Did Not Affect Reproductive Traits Of Sows (1991), I Rettmer, Jeffrey S. Stevenson, Robert D. Goodband, Duane L. Davis
One-Day Supplementation With Tyrosine Did Not Affect Reproductive Traits Of Sows (1991), I Rettmer, Jeffrey S. Stevenson, Robert D. Goodband, Duane L. Davis
Kansas Agricultural Experiment Station Research Reports
Primiparous and multiparous sows received a single dietary supplement of L-tyrosine in their feed on the day after weaning, and the effects on various reproductive traits were evaluated. Sows received either none (control; n = 21) or 45.5 mg L-tyrosine/lb BW (tyrosine; n = 22) on the day after weaning. In Exp. 1, days from weaning to estrus (5.1 ± 1 vs 5.3 ± .9 d) and ovulation rate (number of corpora lutea on ovaries on d 5 after estrus) (16.3 ± 4.4 vs 16.2 ± 4) were similar in control and tyrosine-supplemented sows. In Exp. 2, (control; n = …
Effect Of Fat Source And Level On Finishing Pig Performance (1991), David A. Nichols, Joe D. Hancock, Jim L. Nelssen, Robert H. Hines, Donald H. Kropf
Effect Of Fat Source And Level On Finishing Pig Performance (1991), David A. Nichols, Joe D. Hancock, Jim L. Nelssen, Robert H. Hines, Donald H. Kropf
Kansas Agricultural Experiment Station Research Reports
Two hundred and forty finishing pigs were utilized to evaluate the effect of fat source and level on growing pig performance and carcass characteristics. Pigs were fed a milo-soybean meal diet balanced on a constant energy:lysine and energy:protein ratio. Dietary treatments were: 1) control; 2,3,4) 2.5, 5.0, or 7.5% added soybean oil; 5 and 6) 5.0 or 7.5% added tallow. In comparing pigs fed soybean oil to tallow, there were no significant effects on feed intake, average daily gain, or feed to gain ratio. Soybean oil additions compared to tallow resulted in carcasses with significantly more average backfat as well …
Effects Of Pelleting Low-Lysine Diets With Fermentation Products For Weanling Pigs (1991), Joe D. Hancock, Daniel Y.C. Fung, R A. Hart, M T. Manninen
Effects Of Pelleting Low-Lysine Diets With Fermentation Products For Weanling Pigs (1991), Joe D. Hancock, Daniel Y.C. Fung, R A. Hart, M T. Manninen
Kansas Agricultural Experiment Station Research Reports
One hundred twenty pigs (13.2 lb avg initial wt) were used in an experiment to determine the effects of pelleting on the ability of fermentation products to improve growth performance of nursery-age pigs fed low-lysine diets. Treatments were: 1) positive control (1.15 and .95% lysine for d 0 to 14 and 14 to 35, respectively); 2) diet 1 pelleted; 3) low-lysine regimen (1.05 and .85% lysine for d 0 to 14 and 14 to 35, respectively) supplemented with fermentation product (FP)l; 4) diet 3 pelleted; 5) low-lysine regimen supplemented with modified fermentation product (MFP)2; and 6) diet 5 pelleted. For …
Factors Influencing Distribution And Abundance Of The Loggerhead Shrike (Lanius Ludovicianus Migrans) In South-Central Illinois, Eric Lantz Smith
Factors Influencing Distribution And Abundance Of The Loggerhead Shrike (Lanius Ludovicianus Migrans) In South-Central Illinois, Eric Lantz Smith
Masters Theses
The loggerhead shrike (Lanius ludovicianus) is listed as a threatened species in Illinois as a result of population declines that have occurred since approximately 1900. Although Graber et al. (1973) reported that this species had been largely extirpated from the northern two-thirds of Illinois by 1965, there has been no research on shrike distribution or abundance in the state since that time. Consequently, a roadside survey was completed in 32 south-central Illinois counties to delineate the abundance of loggerhead shrikes in the study area and attempt to relate their abundance to land-use patterns among counties surveyed.
Two hundred and eleven …
Increasing Angler Participation In Marine Catch/Tag-And-Release Fishing Programs: Workshop Summary, Program Outlines, And Angler Survey Results, Jon Lucy, Et Al
Increasing Angler Participation In Marine Catch/Tag-And-Release Fishing Programs: Workshop Summary, Program Outlines, And Angler Survey Results, Jon Lucy, Et Al
Reports
The three-part objective of this Sea Grant/National Marine Fisheries Service project was: (1) to examine anglers' experiences with tag-and release fishing programs; (2) to determine significant impediments, if any, to expanded participation in such programs as well as catch-and release fishing in general; and (3) to address anglers' concerns and questions about catch/tag-and-release fishing by developing educational material to promote greater participation in these activities and minimize fish mortalities due to improper tagging or release techniques.
Comparative Ecology, Morphology, And Population Genetics Of Black Triggerfish, Melichthys Niger, Kathryn D. Kavanagh
Comparative Ecology, Morphology, And Population Genetics Of Black Triggerfish, Melichthys Niger, Kathryn D. Kavanagh
Dissertations, Theses, and Masters Projects
No abstract provided.
Using Goats To Control Weeds, John Peirce
Using Goats To Control Weeds, John Peirce
Journal of the Department of Agriculture, Western Australia, Series 4
Feral goats are common in the woodland and tall shrubland areas of arid Australia. They survive and reproduce despite regular shooting, capture and droughts. These goats are considered vermin in Western Australia because of their competition with sheep for forage and their reputation as destroyers of vegetation. Research elsewhere, however, has indicated that it is only the uncontrolled grazing by large numbers of goats that causes degradation, in the same way that uncontrolled grazing by sheep can cause erosion. To some people, however, feral goats are a valuable source of income. They have the potential for meat sales, and they …
Grouse News 1-10 (1991-1995), World Pheasant Association International, Diana Lovel
Grouse News 1-10 (1991-1995), World Pheasant Association International, Diana Lovel
Galliformes Specialist Group and Affiliated Societies: Newsletters
Issue 1 (March 1991)
Editorial, Diana Lovel
Tetraonid study register and abstracting function
Decline of black grouse, Egbert Strauss
Work at Grimso, Jon Swenson
Grouse: Captive breeding and reintroductions, Lain Valentine
How effective is the release of captive bred capercaillie? David Baines
Size of display grounds of capercaillie, E. Viht
New capercaillie research in Scotland, David Baines
Radiotracking of reintroduced black grouse abstract, Stefan Hövel, Sepp Bauer, and Egbert Strauss
Dogs can't find my ptarmigan, David Hancock
Red grouse: The north of England 1990, David Newborn
A second workshop on black grouse, David Baines
Obituary, in memory of Oleg Ismailovich …
The Cracid Newsletter 1(1)-5 (1991-1997), Iucn, Birdlife International, Wpa Cracid Specialist Group
The Cracid Newsletter 1(1)-5 (1991-1997), Iucn, Birdlife International, Wpa Cracid Specialist Group
Galliformes Specialist Group and Affiliated Societies: Newsletters
Volume1, Number 1 (Autumn 1991)
Editors: Angela Schmitz and Richard Buchholz
Status of the highly endangered white-winged guan Penelope albipennis, Victor Raul Diaz Montes
Formation of the WPA-ICBP-SSC-IUCN Cracidae Specialist Group
Cracidae Specialist Group Policy Statement
CSG Action Plan, 1990-1995
Cracid news from around the world: Central America, South America, Europe, and USA
Volumen 2, Numero 2 (Junio 1993)
Editores: Angela Schmitz and Richard Buchholz
Primer intento de introducción de un crácido en peligro, Geer Scheres
El pavon Oreoplasis derbianus protegido y desprotegido, Fernando González García
Técnicas demográficas de posible uso en crácidos, David B. McDonald
Noticias desde el …
Effects Of Trenbolone Acetate On Carcass Characteristics And Serum Testosterone And Cortisol Concentrations In Bulls And Steers On Different Management And Implant Schemes, Steven J. Jones, R. D. Johnson, Chris R. Calkins, M. Dikeman
Effects Of Trenbolone Acetate On Carcass Characteristics And Serum Testosterone And Cortisol Concentrations In Bulls And Steers On Different Management And Implant Schemes, Steven J. Jones, R. D. Johnson, Chris R. Calkins, M. Dikeman
Department of Animal Science: Faculty Publications
The objective of this study was to determine the effects of different implanting schemes on serum testosterone and cortisol concentrations, and carcass traits of bulls and steers implanted with trenbolone acetate (TBA) and zeranol (Z). Twenty Polled Hereford bulls were randomly assigned to one of three treatments after birth. Five calves served as nonimplanted control bulls (NIB). Nine bulls were implanted (IB) with 140 mg of TBA and 36 mg of Z at about 1 mo of age and reimplanted with both compounds 10 wk later. When IB calves were about 21 wk of age, the TBA implant was removed …
The Effect Of Cimaterol And Its Withdrawal On Carcass Composition And Meat Tenderness Of Broiler Chickens, B. L. Gwartney, Chris R. Calkins, Steven J. Jones
The Effect Of Cimaterol And Its Withdrawal On Carcass Composition And Meat Tenderness Of Broiler Chickens, B. L. Gwartney, Chris R. Calkins, Steven J. Jones
Department of Animal Science: Faculty Publications
To examine the effects of cimaterol (CIM) and its withdrawal on meat tenderness and carcass composition, 214-old broiler chickens (n = 288) were randomly assigned to one of nine treatments. For Treatments 1 through 6, bids were fed a control diet or a diet containing 1 ppm CIM until slaughter at 35, 42, or 49 d of age. Treatments 7 and 8 consisted of birds fed the CIM diet for 14 d and then withdrawn from CIM for either 7 or 14 d before slaughter (42 or 49 d of age). In Treatment 9, birds were fed the CIM diet …
Feeding Value Of Grain Sorghum For The Lactating Sow, G. F. Louis, A. J. Lewis, E. R. Peo, Jr.
Feeding Value Of Grain Sorghum For The Lactating Sow, G. F. Louis, A. J. Lewis, E. R. Peo, Jr.
Department of Animal Science: Faculty Publications
Two experiments were conducted to investigate the effects of a corn-soybean meal (CSBM) and a sorghum-soybean meal (S-SBM) diet on reproductive performance and nutrient utilization by sows. In Exp. 1,75 sows (39 gilts; 36 primiparous) were fed either a C-SBM or a S-SBM gestation diet from breeding to d 109, On d 110, sows were assigned to lactation diets; half of the sows from each dietary treatment were assigned to a lactation diet based on the opposite grain. Sow weight change from d 54 to farrowing was greater (P < .06) for sows fed S-SBM than for sows fed C-SBM. There was no difference (P > SO) in weight change of sows during lactation. Feed consumption during …
Gonadotrophin Concentrations And Ovulation Rates In Suffolk Ewes Actively Or Passively Immunized Against Inhibin Alpha, B. D. Schanbacher, S. R. Schemm, S. M. Rhind
Gonadotrophin Concentrations And Ovulation Rates In Suffolk Ewes Actively Or Passively Immunized Against Inhibin Alpha, B. D. Schanbacher, S. R. Schemm, S. M. Rhind
Department of Animal Science: Faculty Publications
Mature Suffolk ewes were either actively or passively immunized against the synthetic fragment of porcine inhibin alpha, pIα(1-30),to determine the effects on gonadotrophin secretion and ovulation rate. Thirteen control ewes were immunized against human serum albumin, 12 ewes were actively immunized against pIα(1-30)and 36 ewes were passively immunized with pIα(1-30)antiserum. Blood samples were collected at 4-h intervals for 72 h from oestrus-synchronized ewes following the withdrawal of the progestagen pessaries. Mean gonadotrophin concentrations measured during the oestrous cycle of control ewes, ewes actively immunized against pIα(1-30) and ewes passively immunized against pIα(1-30)were similar, but their secretory profiles differed. Serum concentrations …
C. R. Henderson: Farm Boy, Athlete, And Scientist, L. Dale Van Vleck
C. R. Henderson: Farm Boy, Athlete, And Scientist, L. Dale Van Vleck
Department of Animal Science: Faculty Publications
Charles R. Henderson was proud to be a product of a farm in Page County, Iowa. He was a one man track team in Coin, Iowa, and a brilliant student. He became a world class competitor in track at Iowa State College and, at the same time, compiled a top academic record. His early experiences set the stage for the exceptional contributions of his animal breeding career, which did not begin until he was nearly 40 yr of age, but which spanned 40 yr when he was the acknowledged leader in development of statistical methodology applied to animal breeding. His …
Heritability Estimates Of Transformations Of Normally Distributed Records, A. L. Destefano, L. Dale Van Vleck
Heritability Estimates Of Transformations Of Normally Distributed Records, A. L. Destefano, L. Dale Van Vleck
Department of Animal Science: Faculty Publications
Milk yields were simulated for identical twin and parent-progeny pairs to determine effect of transformations on genetic variance. Use of identical twin pairs excludes variability due to Mendelian sampling and contribution by the other parent present in parent-progeny records. Phenotypic variances of 616,800; 1,439,200, and 2,261,600 and means from 2267 to 13,603 by increments of 2267 were used for linear scale records. Phenotypic variances of .0100O, .01875, and .02750 and means equal to the natural logarithm of the means for linear scale were used for log scale records. Heritability varied from .05 to .95 by increments of .lo. For each …
Effects Of Breeding Season Length And Calving Season On Range Beef Cow Productivity, Gene H. Deutscher, J. A. Stotts, Merlyn K. Nielsen
Effects Of Breeding Season Length And Calving Season On Range Beef Cow Productivity, Gene H. Deutscher, J. A. Stotts, Merlyn K. Nielsen
Department of Animal Science: Faculty Publications
A 5-yr study was conducted beginning in 1983 with 460 cows to evaluate the effects of three breeding seasons (30,45, and 70 d in length) and two times of spring calving, March (early) and April (late), on cattle production under Nebraska Sandhills range conditions. Criteria evaluated included pregnancy and weaning percentages, calving date and distribution, cow weights and body condition at four intervals, calf birth and weaning weights, and cow productivity. The 30-d breeding season included a 10-d estrus synchronization and AI period; in the other breeding seasons only natural breeding was used. The same sires were used over the …
Wpa News 31 (1991), World Pheasant Association
Wpa News 31 (1991), World Pheasant Association
Galliformes Specialist Group and Affiliated Societies: Newsletters
WPA News (January 1991), number 31
Published by the World Pheasant Association