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Journal

Kansas Agricultural Experiment Station Research Reports

Animal Sciences

1987

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Articles 1 - 30 of 87

Full-Text Articles in Life Sciences

Whole-Plant Forage And Grain Sorghum Silages For Growing Cattle, B. Kirch, S. Hamma, K. Bolsen, H. Ilg, J. Hoover Jan 1987

Whole-Plant Forage And Grain Sorghum Silages For Growing Cattle, B. Kirch, S. Hamma, K. Bolsen, H. Ilg, J. Hoover

Kansas Agricultural Experiment Station Research Reports

Four trials were conducted to determine the feeding value of whole-plant forage and grain sorghum silages. In general, growing cattle fed grain sorghum hybrids (NK2778, Funk's 550, DeKalb 42Y, DeKalb E67) out performed those fed forage sorghum silages. Only moderate to high grain-content, forage sorghums (Buffalo Canex, Pioneer 947, Acco 351) gave performances that approached the grain sorghums. Low grain-content and nonheading forage sorghums (DeKalb 25E, Funk's G-1990) resulted in the poorest cattle performance. These studies indicate that grain content of a sorghum silage is the major determinant of cattle performance and that whole-plant grain sorghums should produce the fastest …

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Influence Of Prebreeding Progesterone Plus Prostaglandin F2-Α On Estrus And Fertility In Lactating Dairy Cows (1987), M.O. Mee, R.E. Stewart, Jeffrey S. Stevenson, Edward P. Call Jan 1987

Influence Of Prebreeding Progesterone Plus Prostaglandin F2-Α On Estrus And Fertility In Lactating Dairy Cows (1987), M.O. Mee, R.E. Stewart, Jeffrey S. Stevenson, Edward P. Call

Kansas Agricultural Experiment Station Research Reports

Progesterone administered before breeding may increase estrous expression and subsequent fertility in lactating dairy cows. Holstein cows (n=302) were assigned randomly at calving to three groups. Cows received no treatment (controls), one injection of prostaglandin F 2-α (PGF), or progesterone plus one injection of PGF (PRID + PGF). The average interval to estrus was 5 days shorter in PRID + PGF cows compared to cows given only PGF. In addition, more cows were observed in estrus 2 to 5 days after treatment in the PRID + PGF group compared to the PGF group. Average days from calving to conception were …

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1987 Agricultural Research, Southeast Kansas Branch Station, L. W. Lomas, K. W. Kelley, J. L. Moyer, D. W. Sweeney Jan 1987

1987 Agricultural Research, Southeast Kansas Branch Station, L. W. Lomas, K. W. Kelley, J. L. Moyer, D. W. Sweeney

Kansas Agricultural Experiment Station Research Reports

Research on beef cattle and crops at Southeast Kansas Branch Station.

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Effect Of Select Menhaden Fish Meal And Dried Whey In Starter Diets For Pigs (1987), G R. Stoner, G L. Allee, Jim L. Nelssen, M E. Johnston Jan 1987

Effect Of Select Menhaden Fish Meal And Dried Whey In Starter Diets For Pigs (1987), G R. Stoner, G L. Allee, Jim L. Nelssen, M E. Johnston

Kansas Agricultural Experiment Station Research Reports

A growth trial was conducted to examine the effects of select menhaden fish meal (SMFM) and dried whey (DW) in starter diets for pigs. A total of 240, 3-wk-old, weaned pigs averaging 12.1 lb were utilized. Pigs did not receive creep feed and were introduced to the experimental diets immediately upon weaning. The trial was conducted for 4 wk. A factorial design with 3 levels of SMFM (0, 4, and 8%) and 2 levels of OW (10 and 20%) was employed. Analysis of the data indicated no SMFM x DW interaction by the end of wk 4. Inclusion of SMFM …

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Apramycin For The Early-Weaned Pig (1987), Jim L. Nelssen, G L. Allee, R C. Thaler, W H. Turlington Jan 1987

Apramycin For The Early-Weaned Pig (1987), Jim L. Nelssen, G L. Allee, R C. Thaler, W H. Turlington

Kansas Agricultural Experiment Station Research Reports

A total of 108 21-day-old pigs, weighing less than 10 lb, were utilized in two, 28-day trials to compare the effects of feeding high nutrient-density diets with either added apramycin, neomycin, or carbadox on pig performance. In Tria1, pigs fed the diet containing Apralan® gained slightly faster and were more efficient (P<.05) than pigs fed neomycin during the first 14 days postweaning. There were no differences in pig performance in Trials I or II for the entire 28-day period. Two additional 28-day on-farm studies using a total of 427, 21-day old pigs were conducted, feeding a high nutrient-density diet medicated with either apramycin or neomycin plus terramycin. In both on-farm trials, pigs fed apramycin gained faster (P<.05) than pigs fed neomycin plus terramycin for the initial 14 days post weaning. In the second on-farm trial, feed intake was higher (P<.09) during the first 14 days for pigs fed apramycin. Additionally, pigs fed diets medicated with apramycin were slightly heavier (1. 7 and 1.5 additional pounds for the first and second on-farm trials, respectively) at 28 days post weaning compared to pigs fed neomycin plus terramycin. These results indicate that apramycin will improve the performance of early-weaned pigs fed high nutrient-density diets compared to other feed medications.; Swine Day, Manhattan, KS, November 19, 1987

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Effects Of Milk Products (Casein And Lactose) On Nutrient Digestibility In Weaned Pigs Fed A High Fat Dry Diet (1987), W H. Turlington, G L. Allee, Jim L. Nelssen Jan 1987

Effects Of Milk Products (Casein And Lactose) On Nutrient Digestibility In Weaned Pigs Fed A High Fat Dry Diet (1987), W H. Turlington, G L. Allee, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

Two trials using a total of 48 pigs were conducted to compare protein (soybean meal and casein) and carbohydrate (dextrose and lactose) sources. In trial 1, digestion studies were conducted to determine apparent digestible energy content of the four treatments and apparent nutrient digestibility coefficients. In trial 2, pigs were sacrificed to determine ileal and total tract (apparent) nutrient digestibility coefficients. Results suggest that milk products are important to improving energy and nutrient digestibility in the young pig. The younger the pig or the sooner after weaning, the greater the benefit from their addition. The data also suggest that milk …

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Concepts And Concerns In Remodeling Swine Facilities (1987), P Murphy Jan 1987

Concepts And Concerns In Remodeling Swine Facilities (1987), P Murphy

Kansas Agricultural Experiment Station Research Reports

Shall I remodel or burn it down? Determining an answer to this question requires careful consideration of construction costs and production goals. When considering a particular building - consider the following:; Swine Day, Manhattan, KS, November 19, 1987

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Grazing And Feedlot Performance Of Heifers Spayed By Two Methods, S.B. Laudert, Gerry L. Kuhl, A.J. Edwards Jan 1987

Grazing And Feedlot Performance Of Heifers Spayed By Two Methods, S.B. Laudert, Gerry L. Kuhl, A.J. Edwards

Kansas Agricultural Experiment Station Research Reports

Two field trials were conducted to compare the pasture and finishing performance of heifers spayed by the Kimberling-Rupp(K-R) technique or by flank spaying plus autografting a piece of ovarian tissue into the rumen wall (FS+A). In trial 1, neither spaying method resulted in gains of grazing heifers different from that of intake controls; however, FS+A heifers gained 5.1% faster than K-R spayed heifers. In trial 2, grazing gains of heifers spayed by the two techniques were similar. During the finishing phase, no performance difference was found among intact, K-R, or FS+A heifers in trial 1 or between K-R and FS+A …

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Effect Of Terramycin® And Bovatec® In Free-Choice Mineral Mixtures On Gains Of Heifers Grazing Native Grass, F. Brazle, Gerry L. Kuhl, D. Harmon, S. Laudert Jan 1987

Effect Of Terramycin® And Bovatec® In Free-Choice Mineral Mixtures On Gains Of Heifers Grazing Native Grass, F. Brazle, Gerry L. Kuhl, D. Harmon, S. Laudert

Kansas Agricultural Experiment Station Research Reports

Supplementing heifers in an intensive-early grazing program with Terramycin ® or Bovatec ® in free-choice, mineral-soybean meal mixtures resulted in Comparable cattle performance. Both feed additive mixtures increased heifer gains about .3 lb per day compared to controls supplemented with a simple mineral mixture.

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Effect Of Limited-Creep Feeding Calves Of Spring-Calving Cows Grazing Native Grass, F. Brazle, Gerry L. Kuhl, L. Corah, K. Zoellner Jan 1987

Effect Of Limited-Creep Feeding Calves Of Spring-Calving Cows Grazing Native Grass, F. Brazle, Gerry L. Kuhl, L. Corah, K. Zoellner

Kansas Agricultural Experiment Station Research Reports

Two limited-creep feeding trials were conducted with spring-born, suckling calves on native grass. The high-energy creep rations containing an ionophore were fed during the last 63 or 85 days before weaning in the two trials. Creep intake was limited with salt to about 1.5 lb per calf daily. Calves consuming the limited-creep feeds gained .26 to .31 lb more per head daily and required 4.4 to 5.5 lb of creep per lb of extra weaning weight.

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The Value Of Drip Versus Spray Cooling At Two Flow Rates To Reduce Heat Stress Of Finishing Swine (1987), David A. Nichols, R C. Thaler, James P. Murphy, Robert H. Hines, Jim L. Nelssen Jan 1987

The Value Of Drip Versus Spray Cooling At Two Flow Rates To Reduce Heat Stress Of Finishing Swine (1987), David A. Nichols, R C. Thaler, James P. Murphy, Robert H. Hines, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

One hundred fifty pigs were used to evaluate the effectiveness of either spray cooling or drip sprinkling to reduce heat stress in finishing swine. In addition, water flow rates of .2 gal/pig/hr and .4 gal/pig/hr were compared. All wetting treatments significantly (P<.01) improved average daily gain and feed intake (P<.05) compared with non-wetted control. No differences were observed in feed to gain ratio among treatments. Drip sprinkling at the higher flow rate resulted in performance equal to that with intermittent spray cooling at both flow rates.; Swine Day, Manhattan, KS, November 19, 1987

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Effect Of Protein And/Or Carbohydrate Fractions Of Dried Whey On Performance And Nutrient Digestibility Of Weanling Pigs (1987), Michael D. Tokach, Jim L. Nelssen, G L. Allee Jan 1987

Effect Of Protein And/Or Carbohydrate Fractions Of Dried Whey On Performance And Nutrient Digestibility Of Weanling Pigs (1987), Michael D. Tokach, Jim L. Nelssen, G L. Allee

Kansas Agricultural Experiment Station Research Reports

One hundred and eighty 3-wk old pigs (initial weight 10.6 lb) were utilized in a 35-day growth trial to determine the effects of the carbohydrate and/or protein fractions of dried whey on pig performance. In addition, 30 3-wk-old pigs (initial weight 10.8 lb) were used in two digestion trials to study the effects of the whey fractions on nutrient digestibility. Dietary treatments included a corn-soybean meal control (CON), control + 20% dried whey (WHE), control + 14% lactose (CHO), control + 2.1% lactalbumin (PRO), control + 14% lactose + 2.1% lactalbumin (CHO + PHD), and control + 8.4% whey protein …

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The Effect Of Season On Response Of Growing-Finishing Pigs To Dietary Fat Levels (1987), G L. Allee, G R. Stoner, M E. Johnston, Jim L. Nelssen Jan 1987

The Effect Of Season On Response Of Growing-Finishing Pigs To Dietary Fat Levels (1987), G L. Allee, G R. Stoner, M E. Johnston, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

This experiment was conducted to examine the influence of season on the response of finishing pigs to practical levels of fat addition. A total of 378 pigs (average initial weight per trial ranging from 83 to 98 pounds) were utilized in four finishing trials conducted during time frames approximating the 4 seasons of the year. Groups of pigs were taken off trial as they reached market weight (230 pounds). There was no season x fat level interaction for any of the criteria measured. Therefore, it is concluded that season has essentially no effect on fat level response. Fat addition influenced …

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The Effects Of Added Niacin During Lactation On Sow And Litter Performance (1987), Robert D. Goodband, Jim L. Nelssen Jan 1987

The Effects Of Added Niacin During Lactation On Sow And Litter Performance (1987), Robert D. Goodband, Jim L. Nelssen

Kansas Agricultural Experiment Station Research Reports

An on-farm field study utilizing 231 sows was conducted to determine the effects of added niacin during a 21-day lactation on sow and litter performance. At farrowing, sows were assigned to one of two dietary treatments that provided either 200 or 1000 mg niacin/day. All Iitters were equalized within dietary treatment by 24 hours following farrowing. All sows had a similar number of pigs born alive, pigs equalized per litter, and average pig and litter birth weights. Feeding sows a diet providing 1000 mg additional niacin did not significantly affect the number of pigs weaned, pig survival, or average pig …

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Effects Of Grain Sorghum Hybrid On Finishing Pig Performance (1987), G Goldy, Robert H. Hines, Robert D. Goodband Jan 1987

Effects Of Grain Sorghum Hybrid On Finishing Pig Performance (1987), G Goldy, Robert H. Hines, Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

Two trials were conducted to compare the feeding value of homozygous and heterozygous yellow endosperm grain sorghum and corn for finishing pigs. Homozygous yellow endosperm grain sorghum had no advantage in feeding value over heterozgous yellow endosperm hybrids (P>.05). Finishing hogs fed grain sorghum hybrids did not differ (P>.05) in average daily gain, feed intake, or feed efficiency compared to those fed a corn diet.; Swine Day, Manhattan, KS, November 19, 1987

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Estrous Expression Of Sows After Altered Suckling And Boar Exposure (1987), E A. Newton, Jeffrey S. Stevenson, Duane L. Davis Jan 1987

Estrous Expression Of Sows After Altered Suckling And Boar Exposure (1987), E A. Newton, Jeffrey S. Stevenson, Duane L. Davis

Kansas Agricultural Experiment Station Research Reports

In two different experiments, we studied the influence of: 1) separating litters from their dams (altered suckling) during the last 8 days of lactation, which included a change in housing and social interaction with other sows; 2) providing boar exposure (1 hr/d); and 3) parity on the ability of sows to come into heat during lactation and after weaning. Our studies indicated that: 1) 6 hr of altered suckling and 1 hr of boar exposure may shorten the interval to heat for sows that express estrus during lactation, but 3 hr of altered suckling and 1 h of boar exposure …

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The Changing Structure Of Red Meat Demand (1987), James Mintert Jan 1987

The Changing Structure Of Red Meat Demand (1987), James Mintert

Kansas Agricultural Experiment Station Research Reports

Testing for a demand change was done using pork and beef demand models estimated over the 1950-1984 period. Results suggest that a structural change has taken place in both beef and pork demand. The beef demand change, however, appears to have been more severe than that noted for pork.; Swine Day, Manhattan, KS, November 19, 1987

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Performance Of Early Weaned Calves Fed Lasalocid (1987), K.L. Anderson, Tiruvoor G. Nagaraja, J.L. Morrill, P.G. Reddy Jan 1987

Performance Of Early Weaned Calves Fed Lasalocid (1987), K.L. Anderson, Tiruvoor G. Nagaraja, J.L. Morrill, P.G. Reddy

Kansas Agricultural Experiment Station Research Reports

Twenty-two newborn, bull calves were used to determine the effects of lasalocid on growth and feed intake of early-weaned calves from week 1 to 12. Calves were assigned to lasalocid or control groups on day 3. Lasalocid-fed group received lasalocid in milk from day 4 to 7 and in milk and pre-starter from days 7 to 14 and in starter feed from weeks 2 to 12. Lasalocid-fed calves had a significantly higher feed consumption and greater weight gain than calves that did not receive lasalocid. The difference became apparent only after 6 wk of age. Lasalocid appears to be a …

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Early Lactation Somatic Cell Count Should Be Low (1987), James R. Dunham Jan 1987

Early Lactation Somatic Cell Count Should Be Low (1987), James R. Dunham

Kansas Agricultural Experiment Station Research Reports

Cows and heifers in milk for fewer than 50 days, as shown on the DHIA Somatic Cell Count report, should have a lower average Somatic Cell Count than cows in milk for more than 300 days, if the dry cow mastitis treatment and management programs are effective. The DHIA Somatic Cell Count (SCC) average for a dairy herd is a good evaluation of a mastitis control program. Since leucocytes migrate to the mammary system during periods of subclinical mastitis, the SCC average indicates the amount of subclinical mastitis in a herd. A realistic goal for a herd average SCC is …

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How Important Is Extra Solids-Not-Fat In Your Milk? (1987), H.A. Roberts Jan 1987

How Important Is Extra Solids-Not-Fat In Your Milk? (1987), H.A. Roberts

Kansas Agricultural Experiment Station Research Reports

Milk with high solids-not-fat is valuable to the consumer for its flavor and nutritional value and to the manufacturer of milk products, especially relating to cheese yield. Solids-not-fat consists of all solids in milk other than fat. Protein is the most important component of milk because of its nutritional value and its functional properties. Other components, such as milk fat and lactose, also contribute to milk quality and impart certain characteristics to milk products but to a lesser degree.; Dairy Day, 1987, Kansas State University, Manhattan, KS, 1987;

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Effects Of Flushing, Altrenogest, And Pubertal Status On Litter Traits In Gilts (1987), M T. Rhodes, Duane L. Davis, Jeffrey S. Stevenson Jan 1987

Effects Of Flushing, Altrenogest, And Pubertal Status On Litter Traits In Gilts (1987), M T. Rhodes, Duane L. Davis, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

We tested the effects of flushing (3.4 lb extra ground sorghum grain for at least 10 days before estrus) and estrous synchronization with altrenogest on litter traits in gilts. Altrenogest had no effect on litter size or weight, but flushing increased both traits. The response to flushing occurred entirely among gilts artificially inseminated at the pubertal estrus. Pubertal gilts represented approximately 40% of the gilts in our experiment, and their improvement in litter size was almost two pigs. When all gilts were considered, flushing improved litter size by .9 pigs.; Swine Day, Manhattan, KS, November 19, 1987

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Characteristics Of Frankfurters From Preblended Pork (1987), Curtis L. Kastner, Y I. Choi, Donald H. Kropf Jan 1987

Characteristics Of Frankfurters From Preblended Pork (1987), Curtis L. Kastner, Y I. Choi, Donald H. Kropf

Kansas Agricultural Experiment Station Research Reports

Five pork carcasses were used to determine the effects of hot boning and various combinations of salt (0, 1.5, or 3.0%) and a phosphate mixture (0 or 0.5%) on functional, processing, and storage characteristics of preblended pork (preblends). Although hot-boned (HB) preblends had superior functional properties compared to conventionally boned (CB) preblends, HB and CB frankfurters had similar characteristics. More (P(.05) myosin and actin (proteins that cause lean and fat particles to bind together) were extracted from HB than CB preblends. Addition of salt (1.5 or 3.0%) or phosphate (0.5%) generally increased myosin and actin extraction in both HB and …

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Protein Requirement Of Finishing Barrows And Gilts (110 To 230 Lbs) (1987), Robert H. Hines, B A. Koch, David A. Nichols, L M. Turlington, Robert D. Goodband Jan 1987

Protein Requirement Of Finishing Barrows And Gilts (110 To 230 Lbs) (1987), Robert H. Hines, B A. Koch, David A. Nichols, L M. Turlington, Robert D. Goodband

Kansas Agricultural Experiment Station Research Reports

Eighty barrows and 80 gilts were fed diets containing four crude protein levels (16, 15, 14, and 13%) from approximately 115 lb to a market weight of 230-235 lb. Barrows and gilts were fed separately to determine their protein requirements during the finishing period. Performance traits (ADG, ADF, and F/G) of barrows and gilts were not significantly affected by increasing the protein content of the diet from 13 to 16%. However, barrows linearly decreased in fat thickness at the 10th rib as crude protein content in the diet was increased. Also, percent muscle increased linearly with increased protein for barrows, …

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Effects Of Pneumo-Guard H® And Vitamin E On Gain And Health Of Stockers Purchased As Steers And Bulls, F. Brazle Jan 1987

Effects Of Pneumo-Guard H® And Vitamin E On Gain And Health Of Stockers Purchased As Steers And Bulls, F. Brazle

Kansas Agricultural Experiment Station Research Reports

Pneumo-Guard H® and injectable Vitamin E did not improve cattle gain or reduce treatments required per animal during a 29-day receiving trial. Stockers purchased as steers gained faster (P<.001) and required fewer (P<.001) treatments per animal than bulls castrated on arrival.

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Compudose® Vs Ralgro®/Synovex-S® Or Synovex-S®/Synovex-S® Reimplant Programs For Finishing Yearling Steers, S.B. Laudert, R.W. Lee Jan 1987

Compudose® Vs Ralgro®/Synovex-S® Or Synovex-S®/Synovex-S® Reimplant Programs For Finishing Yearling Steers, S.B. Laudert, R.W. Lee

Kansas Agricultural Experiment Station Research Reports

Three field trials were conducted with finishing yearling steers to compare the performance of cattle receiving Compudose® or Ralgro®/Synovex-S® and Synovex-S®/Synovex-S® reimplant combinations. No differences were found between Compudose and the reimplant programs in cattle daily gain, feed efficiency, or cost of gain. Compudose retention was 97.5% in the 1317 head implanted. Synovex-S implant site abscess rate ranged from 5.7 to 15.4%.

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Compudose® Compared With Synovex-H® For Finishing Yearling Heifers, S.B. Laudert Jan 1987

Compudose® Compared With Synovex-H® For Finishing Yearling Heifers, S.B. Laudert

Kansas Agricultural Experiment Station Research Reports

Feedlot heifers implanted once with either Compudose® or Synovex-H® performed similarly, with daily gains of 3.16 vs 3.27 lbs, respectively. Compudose retention in the ear was 97.5%. Implant site abscess rate was 2.5% for Compudose and 13.7% for Synovex-H.

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Influence Of Mixtures Of High Moisture Corn And Dry Rolled Wheat On Finishing Performance And Carcass Characteristics, B.J. Bock, Robert T. Brandt Jr., D.L. Harmon Jan 1987

Influence Of Mixtures Of High Moisture Corn And Dry Rolled Wheat On Finishing Performance And Carcass Characteristics, B.J. Bock, Robert T. Brandt Jr., D.L. Harmon

Kansas Agricultural Experiment Station Research Reports

Dry rolled wheat and high moisture corn were fed singly and in three combinations in a 132-day finishing trial. Daily gain, feed intake, and final live weight were greatest on the 75% corn:25% wheat diet. Feed efficiencies and carcass characteristics were not affected by grain combination. Daily gain and feed intake tended to decrease as percentage of wheat in the diet increased above 25%.

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Effects Of Energy Level And Lasalocid On Productivity Of Fall-Calving, First-Calf Heifers, T. Goehring, L. Corah, James J. Higgins Jan 1987

Effects Of Energy Level And Lasalocid On Productivity Of Fall-Calving, First-Calf Heifers, T. Goehring, L. Corah, James J. Higgins

Kansas Agricultural Experiment Station Research Reports

Fall-calving, first-calf heifers (136 head) were fed TDN levels approximating 85% or 100% of NRC recommendations, with or without 200 mg/hd/day lasalocid. Those fed the recommended diet gained more weight from 130 days prepartum to calving and showed more improvement in condition score before calving than those on the low-energy diet. After calving, the group fed the recommended energy level lost less weight and condition and had better reproductive performance than the low-energy group. The only effect of lasalocid was to improve calf performance in the low-energy group.

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Effect Of Environmental Temperature And An Inoculant On The Fermentation Of Forage Sorghum Silage, K. Bolsen Jan 1987

Effect Of Environmental Temperature And An Inoculant On The Fermentation Of Forage Sorghum Silage, K. Bolsen

Kansas Agricultural Experiment Station Research Reports

The inoculants, BioPower®, increased the rate and efficiency of ensiling in Acco Paymaster 351 forage sorghum regardless of storage temperature. The untreated, 60 F silage fermentated slower and had higher pH, lower lactic acid, and higher acetic acid values than its 90 F counterpart.

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Implant Comparisons In Grazing And Finishing Spayed Heifers, S.B. Laudert, Gerry L. Kuhl, A.J. Edwards Jan 1987

Implant Comparisons In Grazing And Finishing Spayed Heifers, S.B. Laudert, Gerry L. Kuhl, A.J. Edwards

Kansas Agricultural Experiment Station Research Reports

Heifers that were flank-spayed plus rumen-ovarian autografted (FS+A) responded similarly to Ralgro®, Synovex-H®, and Synovex-S® implants on' pasture. Grazing heifers spayed by the Kimberling-Rupp technique also responded similarly to Synovex-H and Synovex-S implants. During the finishing phase, heifers implanted with Synovex-S gained 5.7% faster than heifers implanted with Ralgro, and those implanted with Synovex-H were intermediate in performance. There was no statistical interaction between spaying method and implant treatment during either the grazing or finishing phases.

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