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Kansas Agricultural Experiment Station Research Reports

1993

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Articles 31 - 60 of 112

Full-Text Articles in Life Sciences

Effect Of Diet Energy Content And Level Of Restriction On Performance, Nutrient Digestibility, And Puberty In Replacement Beef Heifers, Robert T. Brandt Jr., Ronald V. Pope, Jeffrey S. Stevenson Jan 1993

Effect Of Diet Energy Content And Level Of Restriction On Performance, Nutrient Digestibility, And Puberty In Replacement Beef Heifers, Robert T. Brandt Jr., Ronald V. Pope, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Eighty Angus x Hereford crossbred weanling heifers (548 lb) were used in a 2x2 factorial experiment to evaluate dietary energy concentration (NEg .51 vs .61 Mcal/lb) and intake restriction (to produce 1.25 and 2.0 lb/d gain). Intake of the diets (corn - corn silage based; 14% CP) was adjusted every 2 weeks. Steer counterparts to the heifers were used in a 2x3 factorially arranged digestion experiment using the same treatments with an additional ad libitum intake level. There were no interactions between energy content and level of restriction. Heifers fed the higher energy diet maintained equal daily gain on 9.7% …

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Factors Influencing The Price Paid For Bulls At Central Test Stations In Kansas From 1988-1992, D.D. Simms, J.R. Schwenke Jan 1993

Factors Influencing The Price Paid For Bulls At Central Test Stations In Kansas From 1988-1992, D.D. Simms, J.R. Schwenke

Kansas Agricultural Experiment Station Research Reports

Results of 13 sales of Angus (n=185) and Simmental (n=544) bulls at central bull tests in Kansas from 1988 through 1992 were analyzed to determine the relationship between performance and the price received. The Kansas bull test index (based 50% on weight per- day-of-age and 50% on test ADG) was the most significant single factor determining price in both Angus and Simmental bulls. Birth weight, final weight, and frame score were other major contributors to price in Angus bulls, whereas weaning weight ratio, birth weight, and being polled were important in Simmental bulls. Expected progeny differences made small but significant …

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Gastrointestinal Thiaminase Vs. Ration Changes, H.W. Soita, B.E. Brent Jan 1993

Gastrointestinal Thiaminase Vs. Ration Changes, H.W. Soita, B.E. Brent

Kansas Agricultural Experiment Station Research Reports

High levels of the thiamin-destroying enzyme, thiaminase I, were found in the feces of 3 of 50 apparently healthy dairy cows. All high fecal thiaminase I levels returned to normal within 3 weeks, indicating that thiaminase I occurs in "spikes" rather than continuing at elevated levels. All cows sampled had some thiaminase I, but the upper end of the "normal" range in feces was about 3.5 μmol/min/l. Thiaminase I levels were higher in the first than in subsequent lactations. When spikes in thiaminase I activity occurred, they were concentrated within about 20 days of calving and of the associated change …

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Implant Comparisons In Feedlot Steers And Heifers, T.P. Eck, L.R. Corah Jan 1993

Implant Comparisons In Feedlot Steers And Heifers, T.P. Eck, L.R. Corah

Kansas Agricultural Experiment Station Research Reports

Feedlot performance of steers implanted with Compudose®, Implus-S®, or Synovex-S® was very similar. No statistical differences were detected among treatments. However, implanted steers gained an average of 4% faster than nonimplanted controls. Carcass quality was virtually unaffected by treatment. Implanting feedlot heifers with Synovex- H®, Implus-H®, or Implus-H® plus Finaplix- H® increased daily gain compared to non-implanted heifers. Implanting improved gain and feed efficiency by 13 and 7.1%, respectively, compared to controls. Differences in carcass characteristics probably were due to the increased weight gain associated with implants. Percentage of carcasses grading Choice was not impacted by treatment.

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Effect Of Zinpro 100® In A Mineral Mixture On Gain And Incidence Of Footrot In Steers Grazing Native Grass Pastures, F.K. Brazle Jan 1993

Effect Of Zinpro 100® In A Mineral Mixture On Gain And Incidence Of Footrot In Steers Grazing Native Grass Pastures, F.K. Brazle

Kansas Agricultural Experiment Station Research Reports

In a 3-year study, crossbred steers averaging 585 lb were allotted to groups given either a control or zinc methionine-supplemented mineral mixture while grazing burned native pastures in early summer. The steers were monitored for weight gain and incidence of footrot. The addition of 100 lb Zinpro 100® (50% zinc methionine) per ton of free-choice mineral mixture improved (P<.06) steer daily gain .08 lb. and reduced the incidence of footrot 55% (5.38 vs. 2.45%; P<.06). The gain benefit could not be attributed entirely to reduced footrot, but appeared to also have a nutritional basis.

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Comparison Of Synovex-S® And Two Levels Of Revalor-S® In Heavy-Weight Holstein Steers, Gerry L. Kuhl, D.D. Simms, Dale A. Blasi, Curtis L. Kastner Jan 1993

Comparison Of Synovex-S® And Two Levels Of Revalor-S® In Heavy-Weight Holstein Steers, Gerry L. Kuhl, D.D. Simms, Dale A. Blasi, Curtis L. Kastner

Kansas Agricultural Experiment Station Research Reports

In two field trials, 434 Holstein steers averaging 849 lbs were assigned randomly to three single implant treatments: 1) Synovex- S®, 2) Revalor®-S 120 (120 mg trenbolone acetate (TBA) + 24 mg estradiol), and 3) Revalor®-S 140 (140 mg TBA + 28 mg estradiol). Revalor-implanted steers gained .05 to .10 lb per day faster, but this improvement was not statistically significant (P>.05). Both Revalor-implanted groups produced trimmer carcasses with less (P<.05) backfat than Synovex steers. All other carcass characteristics and beef sensory properties, including taste panel evaluations of tenderness, juiciness, and flavor, were not influenced by implant used.

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Effects Of Application Of Water And Nitrogen On Nutrient Use From Corn And Sorghums By Pigs (1993), B T. Richert, P J. Bramel-Cox, Merle D. Witt, B J. Healy, Joe D. Hancock Jan 1993

Effects Of Application Of Water And Nitrogen On Nutrient Use From Corn And Sorghums By Pigs (1993), B T. Richert, P J. Bramel-Cox, Merle D. Witt, B J. Healy, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

An experiment was conducted to determine the effects of growing conditions on nutrient yield and quality of corn and sorghum. Main effect treatments were: corn (C), bronze pericarp heterozygous-yellow endosperm sorghum (BS), and yellow pericarp homozygous-yellow endosperm sorghum (YS); optimal irrigation (I) and minimal irrigation (MI); 100 lb/acre of N fertilization (F) and no N fertilization (NF), in a 3 × 2 × 2 factorial arrangement. Grains were grown in 1988 (Year 1, with little rainfall) and 1989 (Year 2, with above average rainfall) in the semi-arid environment at Garden City, KS. In Year 1, sorghums yielded 15% more grain …

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In Vitro Digestibility Of Sorghum Parent Lines Predicts Nutritional Value Of Their Hybrid Offspring In Cannulated Finishing Pigs (1993), B J. Healy, P J. Bramel-Cox, Robert H. Hines, Joe D. Hancock Jan 1993

In Vitro Digestibility Of Sorghum Parent Lines Predicts Nutritional Value Of Their Hybrid Offspring In Cannulated Finishing Pigs (1993), B J. Healy, P J. Bramel-Cox, Robert H. Hines, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

Nutritional value of eight sorghum hybrids, resulting from matings of four male lines with two male-sterile lines, was determined. The male lines were two sorghums with consistently high in vitro digestibility (High-digestibility 1 and Highdigestibility 2) and two sorghums with consistently low in vitro digestibility (Lowdigestibility 1 and Low-digestibility 2). The male-sterile lines were Kansas 52 and Redlan, two lines commonly used for genetic testing by sorghum breeders. The hybrids were fed to eight barrows fitted with ileal T-cannulas and also evaluated for starch digestibility in ruminal fluid. Corn was used as a control. Corn had greater ileal and total …

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The Influence Of Dietary Lysine On Carcass Characteristics And Subprimal Cut Distribution Of High-Lean Growth Gilts Fed To 230 And 300 Lb (1993), S R. Stuewe, K G. Friesen, Jim L. Nelssen, Robert D. Goodband, Michael D. Tokach, John A. Unruh Jan 1993

The Influence Of Dietary Lysine On Carcass Characteristics And Subprimal Cut Distribution Of High-Lean Growth Gilts Fed To 230 And 300 Lb (1993), S R. Stuewe, K G. Friesen, Jim L. Nelssen, Robert D. Goodband, Michael D. Tokach, John A. Unruh

Kansas Agricultural Experiment Station Research Reports

Seventy-two high-lean growth gilts were used to determine the effects of dietary lysine on carcass characteristics and subprimal cut distribution of gilts fed to 230 or 300 lb. The gilts were fed one of six lysine treatments (digestible lysine of .44, .54, .64, .74, .84, and .94% corresponding to .55, .67, .79, .91, 1.03, and 1.15% total lysine, respectively). For gilts fed to 230 or 300 lb, effects on carcass characteristics or subprimal cut distribution were minimal. For gilts fed to 230 lb, only slight linear decreases in 402 ham and boneless 402C ham were observed as dietary lysine increased. …

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Influence Of Dietary Lysine On Growth Performance Of High-Lean Growth Gilts Fed From 160 To 300 Lb (1993), K G. Friesen, K Q. Owen, B T. Richert, L J. Kats, B J. Kerr, Jim L. Nelssen, Robert D. Goodband, Michael D. Tokach, John A. Unruh, Donald H. Kropf Jan 1993

Influence Of Dietary Lysine On Growth Performance Of High-Lean Growth Gilts Fed From 160 To 300 Lb (1993), K G. Friesen, K Q. Owen, B T. Richert, L J. Kats, B J. Kerr, Jim L. Nelssen, Robert D. Goodband, Michael D. Tokach, John A. Unruh, Donald H. Kropf

Kansas Agricultural Experiment Station Research Reports

One-hundred eight high-lean growth gilts (159.6 lb) were used to determine the dietary lysine requirement to optimize growth performance from 160 to 300 lb. The experiment was designed as a randomized complete block, with initial weight serving as the blocking factor. Six dietary treatments were used, ranging from .44 to .94% digestible lysine (.59 to 1.16% total lysine). Pigs were housed in pens of three, with six replicate pens/treatment. Pig weights and feed disappearance were collected weekly to calculate average daily gain (ADG), average daily feed intake (ADFI), and feed efficiency (F/G). Average daily gain increased from 160 to 230 …

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Influence Of Dietary Lysine On Carcass Characteristics Of High-Lean Growth Gilts Fed From 80 To 160 Lb (1993), K G. Friesen, B J. Kerr, Jim L. Nelssen, Robert D. Goodband, Michael D. Tokach, John A. Unruh, Donald H. Kropf Jan 1993

Influence Of Dietary Lysine On Carcass Characteristics Of High-Lean Growth Gilts Fed From 80 To 160 Lb (1993), K G. Friesen, B J. Kerr, Jim L. Nelssen, Robert D. Goodband, Michael D. Tokach, John A. Unruh, Donald H. Kropf

Kansas Agricultural Experiment Station Research Reports

Seventy-two high-lean growth gilts (initially 75.5 lb BW) were used to determine the influence of dietary lysine on carcass characteristics at 120 and 160 lb. Gilts were randomly selected for slaughter when the average weight of pigs in the pen equaled or exceeded 120 and 160 lb. The experiment was designed as a randomized complete block, with initial weight serving as the blocking factor. Six dietary treatments were included, ranging from .54 to 1.04% digestible lysine (.69 to 1.25% total dietary lysine). At 120 lb, hot carcass weight decreased and then increased as did dressing percentage for gilts fed increased …

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Influence Of Dietary Lysine On Growth Performance And Tissue Accretion Rates Of High-Lean Growth Gilts Fed From 80 To 160 Lb (1993), K G. Friesen, L J. Kats, B J. Kerr, Jim L. Nelssen, Robert D. Goodband, Michael D. Tokach, John A. Unruh, Donald H. Kropf Jan 1993

Influence Of Dietary Lysine On Growth Performance And Tissue Accretion Rates Of High-Lean Growth Gilts Fed From 80 To 160 Lb (1993), K G. Friesen, L J. Kats, B J. Kerr, Jim L. Nelssen, Robert D. Goodband, Michael D. Tokach, John A. Unruh, Donald H. Kropf

Kansas Agricultural Experiment Station Research Reports

One-hundred eight high-lean growth gilts (75.5 lb initial weight) were used to determine the dietary lysine requirement to maximize growth performance and protein accretion from 80 to 160 lb. The experiment was designed as a randomized complete block, with initial weight serving as the blocking factor. Six dietary treatments were included, ranging from .54 to 1.04% digestible lysine (.69 to 1.25% total dietary lysine). Pigs were housed in pens of three, with six replicate pens/treatment. Pig weights and feed disappearance were collected weekly to calculate average daily gain (ADG), average daily feed intake ADFI, and feed efficiency (F/G). Initially, six …

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Kansas State University Swine Enterprise Record Summary (1993), B T. Richert, Michael R. Langemeier, Robert D. Goodband, Michael D. Tokach, Jim L. Nelssen Jan 1993

Kansas State University Swine Enterprise Record Summary (1993), B T. Richert, Michael R. Langemeier, Robert D. Goodband, Michael D. Tokach, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

Approximately 30 swine operations are enrolled in the 1992 - 93 Kansas Swine Enterprise Record Program provided by Kansas State University. This program evaluates biological and economic performance and is part of a cooperative record-keeping project with extension personnel and swine producers in Kansas, Nebraska, and South Dakota. Records are summarized every 6 months, and the corresponding data are pooled to form state and regional averages. This summary is the combined data for the 18 farrow-to-finish operations in Kansas that kept records during 1992. The semiannual data represents the last 6 months of 1992, whereas the annual data are for …

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Comparison Of Feed-Grade Antibiotics In Starter Diets Containing Spray-Dried Blood Products (1993), K Q. Owen, Steven S. Dritz, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen Jan 1993

Comparison Of Feed-Grade Antibiotics In Starter Diets Containing Spray-Dried Blood Products (1993), K Q. Owen, Steven S. Dritz, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

A total of 240 pigs (initially 11.6 lb and 19 d of age) was used to compare four different feed-grade antibiotics or antibiotic combinations in phase I (d 0 to 14 postweaning) and phase II (d 14 to 28 postweaning) starter pig diets. Apramycin and carbadox were compared in the phase I diet. Combinations of tylosin/sulfamethazine and neomycin sulfate/oxytetracycline were compared in the phase II diet. No differences occurred in pig performance for the phase I and phase II periods between the feed-grade antibiotics compared in this growth assay. Therefore, determination of appropriate feed-grade antibiotic inclusion will depend on 1) …

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Evaluation Of Carcass Merit Pricing By Pork Packers (1993), Ted C. Schroeder Jan 1993

Evaluation Of Carcass Merit Pricing By Pork Packers (1993), Ted C. Schroeder

Kansas Agricultural Experiment Station Research Reports

Live hog prices must reflect end-use value to convey market information from consumers to producers. Precise end-use value is excessively costly to trace for each carcass given current technology. Pricing structures must be based upon carcass merit information that is correlated with end-use value. This study uses pork carcass cut out data from 794 carcasses to estimate hog carcass values based upon carcass characteristics. Carcass values varied by nearly $20/cwt based on quality differences alone. In addition, considerable differences were present in pricing schedules of different pork packers suggesting that hog producers need to shop around when deciding to which …

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Comparison Of Carbohydrate Sources For The Early-Weaned Pig (1993), C A. Kerr, Steven S. Dritz, Robert D. Goodband, Jim L. Nelssen, Michael D. Tokach Jan 1993

Comparison Of Carbohydrate Sources For The Early-Weaned Pig (1993), C A. Kerr, Steven S. Dritz, Robert D. Goodband, Jim L. Nelssen, Michael D. Tokach

Kansas Agricultural Experiment Station Research Reports

A total of 180 weanling pigs (initially 11.7 lb and 21 d of age) was used in a 35 d growth assay to compare various carbohydrate sources from d 0 to 14 postweaning in phase I. Pigs were allotted by weight and ancestry to one of five experimental diets with six pigs per pen and six replications per treatment. Pigs were fed one of five experimental diets from d 0 to 14 postweaning. The experimental carbohydrate sources compared were corn, oat flour, two modified potato starches, and lactose. All pigs were then fed a common phase II diet from d …

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State Of The Kansas Swine Industry (1993), B L. Moore, Ted C. Schroeder, Michael R. Langemeier, Barry L. Flinchbaugh Jan 1993

State Of The Kansas Swine Industry (1993), B L. Moore, Ted C. Schroeder, Michael R. Langemeier, Barry L. Flinchbaugh

Kansas Agricultural Experiment Station Research Reports

The Kansas hog industry represented 3.8% of U.S. hog production in 1977 and had peak production of nearly 3.4 million head in 1971. Since that time, the industry has declined significantly, representing only 2.5% of U.S. hog production with 2.5 million head produced in 1992. Kansas hog production has declined, while neighboring Nebraska has enjoyed increased production and share of U.S. production. Kansas hog production is also highly concentrated, with the largest 3.5% of producers owning 45.5% of the state's hog inventory. Efforts to identify specific causes and to change the economic environment will be required to reverse the decline …

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Effects Of Hammermills And Roller Mills On Growth Performance, Nutrient Digestibility, And Stomach Morphology In Finishing Pigs (1993), K J. Wondra, C R. Stark, Robert H. Hines, Joe D. Hancock, Keith C. Behnke Jan 1993

Effects Of Hammermills And Roller Mills On Growth Performance, Nutrient Digestibility, And Stomach Morphology In Finishing Pigs (1993), K J. Wondra, C R. Stark, Robert H. Hines, Joe D. Hancock, Keith C. Behnke

Kansas Agricultural Experiment Station Research Reports

The effects of particle size and mill type used to grind corn were determined with 128 pigs (122 lb average initial body wt). Treatments were corn ground in a hammermill and a roller mill to 800 and 400 μm. The roller mill was more efficient than the hammermill when grinding the corn, with less energy consumption and greater production rate per horsepower hour. For the 800 μm treatments, greater uniformity of particle size was achieved with the roller mill than the hammermill; however, at the 400 μm treatments, corn ground with the hammermill was slightly more uniform. Pigs fed corn …

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Sorghum Genotype And Particle Size Affect Growth Performance, Nutrient Digestibility, And Stomach Morphology In Finishing Pigs (1993), M R. Cabrera, P J. Bramel-Cox, Robert H. Hines, Joe D. Hancock, Keith C. Behnke Jan 1993

Sorghum Genotype And Particle Size Affect Growth Performance, Nutrient Digestibility, And Stomach Morphology In Finishing Pigs (1993), M R. Cabrera, P J. Bramel-Cox, Robert H. Hines, Joe D. Hancock, Keith C. Behnke

Kansas Agricultural Experiment Station Research Reports

Seventy pigs (average initial body wt of 119 lb) were used to determine the effects of sorghum genotype on milling characteristics, growth performance, nutrient digestibility, and stomach morphology in finishing pigs. The pigs were fed a corn-soybean meal-based control diet, with the corn (Pioneer 3377) milled to a mean particle size of 600 μm. Hard-endosperm sorghum (Pioneer 8585) and soft-endosperm sorghum (Pioneer 894) were milled to mean particle sizes of 800, 600, and 400 μm and substituted for the corn in the control diet on a wt/wt basis, so that the overall treatment arrangement was a 2 × 3 factorial …

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Soybean Meal Is Necessary In Diets For Early-Weaned (12 D Of Age) Pigs (1993), K Q. Owen, Steven S. Dritz, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband Jan 1993

Soybean Meal Is Necessary In Diets For Early-Weaned (12 D Of Age) Pigs (1993), K Q. Owen, Steven S. Dritz, Michael D. Tokach, Jim L. Nelssen, Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

A total of 192 pigs (initially 8.0 lb and 12 d of age) was used to determine the optimal soybean meal level to be included in starter diets for the 12-d-old weaned pig. The trial was a 28 d growth assay. Pigs were allotted by weight to six replicates of four treatments with six or 10 pigs per pen. From d 0 to 14 postweaning, pigs were fed a common diet or experimental diets containing 5, 10, and 15% soybean meal. These high nutrient dense diets were formulated to contain 1.7% lysine. All pigs were fed a common transition diet …

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Optimum Level Of Spray-Dried Porcine Plasma For Early-Weaned (10.5 D Of Age) Starter Pigs (1993), K Q. Owen, Steven S. Dritz, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen Jan 1993

Optimum Level Of Spray-Dried Porcine Plasma For Early-Weaned (10.5 D Of Age) Starter Pigs (1993), K Q. Owen, Steven S. Dritz, Michael D. Tokach, Robert D. Goodband, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

A total of 290 early-weaned pigs (initially 7.6 lb and 10.5 d of age) was used to evaluate various levels of spray-dried porcine plasma. Pigs were assigned to one of five experimental diets with either 5, 7.5, 10, 12.5, or 15% spray-dried porcine plasma replacing dried skim milk. Pigs were fed this diet for the first 14 days postweaning. Common diets were fed from d 14 to 42 postweaning in order to monitor subsequent performance. During the first phase (d 0 to 14 postweaning), linear improvements in average daily gain (ADG) and average daily feed intake (ADFI) occurred as the …

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Growth And Microbiology Of Nonmedicated, Segregated, Early-Weaned Pigs (1993), M M. Chengappa, M W. Vorhies, Steven S. Dritz, Jim L. Nelssen, Michael D. Tokach, Robert D. Goodband Jan 1993

Growth And Microbiology Of Nonmedicated, Segregated, Early-Weaned Pigs (1993), M M. Chengappa, M W. Vorhies, Steven S. Dritz, Jim L. Nelssen, Michael D. Tokach, Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

Seventy pigs, 7 to 10 d of age, were randomly selected by litter of origin from a commercial farm in Northeast Kansas to compare the growth and microbiology of nonmedicated, segregated, early-weaned pigs to controls raised at the farm of origin. After weaning, both groups were fed a similar nutritional programs consisting of dry diets. No antimicrobial drugs were administered to the pigs except for a feed grade antimicrobial (carbadox) from weaning to 50 lb. Pigs were monitored for 12 weeks. Individual pigs weights, nasal swabs, and serum samples were collected on d 0 and then every 14 d thereafter …

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Extrusion Of Sorghum Grain And Soybeans For Lactating Sows (1993), C G. Mills, Terry L. Gugle, Robert H. Hines, Joe D. Hancock Jan 1993

Extrusion Of Sorghum Grain And Soybeans For Lactating Sows (1993), C G. Mills, Terry L. Gugle, Robert H. Hines, Joe D. Hancock

Kansas Agricultural Experiment Station Research Reports

One hundred-seventeen primiparous sows were used to determine the effects of extruded sorghum grain and soybeans in lactation diets on sow and litter performance. The sows were fed a sorghum-soybean-based diet with the sorghum and soybeans extruded either singly or together. Treatments were: 1) ground sorghum-soybean meal (SBM)-soy oil-based control; 2) extruded sorghum-SBM-soy oil; 3) ground sorghum-extruded soybeans; and 4) sorghum and extruded soybeans blended then extruded together (extruded blend). All diets were formulated to .80% lysine, .90% Ca, .80% P, and 1.47 Mcal ME/lb. Sows fed diets with extruded ingredients tended to wean more pigs with greater survivability and …

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Kansas Farm Management Association Dairy Cow Herd Enterprise Management Analysis (1993), F. D. Delano, Michael R. Langemeier Jan 1993

Kansas Farm Management Association Dairy Cow Herd Enterprise Management Analysis (1993), F. D. Delano, Michael R. Langemeier

Kansas Agricultural Experiment Station Research Reports

Actual dairy cow herd enterprise records from Kansas Farm Management Association farms over the past 4 years have shown an increase in returns over variable costs from $17,900 to $23,300 per farm for a 100-cow dairy herd in favor of herds with higher milk-producing cows. Cost per hundred weight of milk produced per cow decreased for the higher-producing herds compared with lower-producing herds, even though total cost per cow increased. In 1992, for every extra $1.00 spent on feed and other variable costs, the higher producing herds earned $1.71. This was a 71% return per dollar invested.; Dairy Day, 1993, …

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Effect Of Yearly Milk Per Cow On Profitability Of Dairy Herds (1993), Edward P. Call, James R. Dunham Jan 1993

Effect Of Yearly Milk Per Cow On Profitability Of Dairy Herds (1993), Edward P. Call, James R. Dunham

Kansas Agricultural Experiment Station Research Reports

An analysis of Kansas Holstein herds in 1992 indicated that the yearly milk production per cow had a significant effect on returns to labor and management. The lowest quartile herds (13,445 lb per cow average) had a negative return to management. Herds averaging 20,614 lb per cow yielded $479 return to management. Records become increasingly important in managing the dairy operation, especially those that are readily analyzed and predict the degree of economic change when management is modified.; Dairy Day, 1993, Kansas State University, Manhattan, KS, 1993;

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Looking Ahead With A Look Behind (1993), Edward P. Call Jan 1993

Looking Ahead With A Look Behind (1993), Edward P. Call

Kansas Agricultural Experiment Station Research Reports

The current economic situation dictates that dairy producers use all available tools and resources to maximize efficiency. Yearly milk yield is the most reliable predictor of profitability. Because the genetic base dictates each cow's potential for converting feed into milk, using 80+ percentile proved sires is strongly recommended along with a 100% commitment to artificial insemination of cows and heifers. Current technology allows dairy producers to make significant gains in resolving poor reproductive performance. A user friendly recordkeeping system to routinely measure individual cows' productivity along with overall herd performance is essential for maximizing return on capital investment.; Dairy Day, …

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Components Of A Progressive Reproductive Management Program (1993), Jeffrey S. Stevenson Jan 1993

Components Of A Progressive Reproductive Management Program (1993), Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

These are somewhat exciting times for dairy producers because of the new arsenal of hormones available for controlling estrous cycles and improving fertility. Using Bovilene® seems to assist cows in releasing a retained placenta. Most studies have demonstrated that using GnRH as a followup treatment (day 10 to 18 postpartum) for dairy cows with periparturient problems such as retained placenta improves their subsequent reproductive performance. Prophylactic treatment of early postpartum cows with GnRH (days 10 to 18) or prostaglandin F2α (days 20 to 40) improved their reproductive performance in most studies as well. Injections of GnRH at the time of …

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Use Of Cystorelin® And Artificial Insemination In Repeat-Breeding Beef Heifers After Estrous Synchronization, J.P. Holz, P.L. Houghton, M.F. Spire Jan 1993

Use Of Cystorelin® And Artificial Insemination In Repeat-Breeding Beef Heifers After Estrous Synchronization, J.P. Holz, P.L. Houghton, M.F. Spire

Kansas Agricultural Experiment Station Research Reports

Gonadotropin-releasing hormone (GnRH) was administered to a group of 13- to 14- month-old Angus and Angus crossbred repeat-breeding heifers at the time of the second or third artificial insemination to determine its effect on conception rates. Little benefit was derived from the use of GnRH at either second or third service in highly developed repeat-breeding heifers.

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A Laboratory System For Modeling Hay Storage, W.K. Coblentz, J.O. Fritz, K.K. Bolsen Jan 1993

A Laboratory System For Modeling Hay Storage, W.K. Coblentz, J.O. Fritz, K.K. Bolsen

Kansas Agricultural Experiment Station Research Reports

A simple system is described that uses a hinged metal baling unit and a hydraulic press to make 4.0 x 4.3 x 5.3 inch wire-tied, laboratory- scale, hay bales. A comparison of densities of conventional, small, alfalfa bales (15x18x37 inches) and laboratory bales was made over a wide range of moisture levels (15 to 36%) and conventional bale densities (10 to 25 lb/ft3). Laboratory bale densities were regressed against conventional bale densities and agreement was excellent. The system is inexpensive to build and easy to use and can be reproduced easily.

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Comparison Of Conventional And Laboratory-Scale Alfalfa Hay Bales In Small Haystacks, W.K. Coblentz, J.O. Fritz, K.K. Bolsen Jan 1993

Comparison Of Conventional And Laboratory-Scale Alfalfa Hay Bales In Small Haystacks, W.K. Coblentz, J.O. Fritz, K.K. Bolsen

Kansas Agricultural Experiment Station Research Reports

A system for making laboratory-scale alfalfa hay bales was evaluated in two trials. In the first, conventional rectangular and laboratory-scale bales were made at each of seven different combinations of moisture and density. Laboratory bales were incubated between two parent conventional bales of identical moisture content and bale density. Laboratory bales remained different (P<.05) from parent conventional bales for most temperature-related storage traits. Agreement between bale types was better for most quality traits. To achieve closer agreement between bale types, a second experiment was conducted in which the laboratory bales were made at 1.0, 1.3, 1.6, and 2.0 times the density of the conventional bales. Agreement improved between laboratory bales of higher densities and conventional bales for most temperature traits. High-density laboratory bales had significantly greater acid detergent insoluble nitrogen values than conventional bales, particularly at the highest moisture level. These results implicate bale density as an important factor in heat damage to proteins in alfalfa hay.

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