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Kansas Agricultural Experiment Station Research Reports

1995

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Articles 1 - 30 of 93

Full-Text Articles in Life Sciences

Selection Response And Genetic Parameter Estimation For Feed Intake, Gain, And Feed Conversion, J.B. Jr. Glaze, R.R. Schalles Jan 1995

Selection Response And Genetic Parameter Estimation For Feed Intake, Gain, And Feed Conversion, J.B. Jr. Glaze, R.R. Schalles

Kansas Agricultural Experiment Station Research Reports

Performance records of 1459 Polled Hereford cattle born from 1967 through 1979 were analyzed to estimate genetic parameters and the direct and correlated responses that were due to selection for feed conversion. Heritabilities were .24 for intake, .25 for gain, and .14 for feed conversion. The genetic correlation between average daily gain and feed conversion was -.82; correlation between average daily gain and feed intake was .42. Faster-gaining cattle have greater feed intakes and are more efficient. Feed conversion was improved by direct selection. However, it is more economically feasible for breeders to improve feed conversion by selecting for faster ...


Yearling Scrotal Circumference Prediction Equation And Age Adjustment Factors For Various Breeds Of Beef Bulls, J.M. Geske, R.R. Schalles, K.O. Zoellner Jan 1995

Yearling Scrotal Circumference Prediction Equation And Age Adjustment Factors For Various Breeds Of Beef Bulls, J.M. Geske, R.R. Schalles, K.O. Zoellner

Kansas Agricultural Experiment Station Research Reports

Scrotal circumference measurements and other data were collected on 4,218 Angus, Red Angus, Brangus, Charolais , Gelbvieh, Hereford, Polled Hereford, Limousine, Salers, and Simmental bulls born in the spring of 1991. All were participants in selected on-farm and central bull tests. Our objectives for the study were to develop 205-and 365-day age-adjustment factors for scrotal circumference and derive a 365-day scrotal circumference prediction equation based on adjusted 205-day scrotal circumference. We determined that a 205-day scrotal circumference of approximately 21 cm is necessary to reach 32 cm at 1 year. Age-of-dam adjustment factor for 205-day scrotal circumference is +.8 cm ...


Ad Libitum Suckling By A Foster Calf In The Presence Or Absence Of The Cow's Own Calf Prolongs Postpartum Anestrus To First Ovarian Cycle, G.C. Lamb, J.M. Smith, Jeffrey S. Stevenson Jan 1995

Ad Libitum Suckling By A Foster Calf In The Presence Or Absence Of The Cow's Own Calf Prolongs Postpartum Anestrus To First Ovarian Cycle, G.C. Lamb, J.M. Smith, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Five treatments were initiated approximately 15 days after calving: 1) calf was weaned from its dam (CW); 2) calf was present continually with its own dam (CP-O); 3) calf was present continually with its own dam but contact with the udder was restricted (CR); 4) foster calf was pre sent continually but the cow's own calf was absent (CP-F); and 5) foster calf was present continually, and the dam's own calf was present but restricted (CR+F). Cows weaned at 15 days (CW) cycled in about 2 weeks, whereas cows in the CR treatment cycled 1 week later ...


Influence Of Timing And Rate Of Gain On Puberty And Reproductive Performance Of Beef Heifers, J.M. Smith, G.C. Lamb, J. Ernest Minton, Robert T. Brandt Jr., R.C. Cochran Jan 1995

Influence Of Timing And Rate Of Gain On Puberty And Reproductive Performance Of Beef Heifers, J.M. Smith, G.C. Lamb, J. Ernest Minton, Robert T. Brandt Jr., R.C. Cochran

Kansas Agricultural Experiment Station Research Reports

Seventy-seven crossbred heifers (573 lb initial body weight) were developed in drylot and limit-fed a corn, sorghum silage diet predicted to produce gains of either 1 lb/day for the entire developmental period (EVENGAIN) or .25 lb/day for the first two-thirds of the period followed by 2 lb/day during the last third (LATEGAIN). Treatments began on November 15, 1993 and continued until April 25, 1994, the onset of the breeding season. Actual daily gains averaged 1.31 lb/day for EVENGAIN heifers, whereas LATEGAIN heifers averaged .55 lb/day for the first two-thirds of the feeding period and ...


The Effect Of Dietary Zinc Level And Source On Yearling Bull Growth And Fertility, J.D. Arthington, K.R. Johnson, L.R. Corah, C.L. Willms, D.A. Hill Jan 1995

The Effect Of Dietary Zinc Level And Source On Yearling Bull Growth And Fertility, J.D. Arthington, K.R. Johnson, L.R. Corah, C.L. Willms, D.A. Hill

Kansas Agricultural Experiment Station Research Reports

To study the effect of dietary zinc level and source on bull growth and fertility, 325 yearling Angus bulls were allotted by weight into six pens (three pens of heavy and three pens of lightweight bulls). The three supplemental zinc (Zn) treatments were 1) 40 ppm inorganic Zn all supplied by Zn sulfate (ZnI); 2) 40 ppm Zn with 1/3 supplied by Zn proteinate and 2/3 supplied by Zn sulfate (ZnPI); and 3) 60 ppm ZnI all supplied by Zn sulfate (ZnHi). Initial and final liver biopsies (10 per pen) were collected and analyzed for zinc concentration. Individual ...


Effects Of Grazing System And Stocking Rate On Cow-Calf Performance In The Flint Hills, R.C. Cochran, D.E. Johnson, K. C. Olson, David C. Hartnett, Clenton E. Owensby Jan 1995

Effects Of Grazing System And Stocking Rate On Cow-Calf Performance In The Flint Hills, R.C. Cochran, D.E. Johnson, K. C. Olson, David C. Hartnett, Clenton E. Owensby

Kansas Agricultural Experiment Station Research Reports

A 6-year study was designed to measure the influences of stocking rate and grazing system on performance of cow-calf pairs grazing tallgrass prairie. This paper summarizes the initial 3 years. Late-season rest-rotation was compared to continuous grazing over low, moderate, and high stocking rates. No differences (P>.10) were observed in body weight of cows or calves as a result of grazing system or stocking rate. However, calf weaning weight tended (P=.20) to be greater with continuous grazing than with late season rest-rotation. Cow body condition score was unaffected (P>.10) by stocking rate or grazing system. Conception rates ...


Influence Of Degradable Intake Protein On Site And Extent Of Digestion In Beef Cows Consuming Low-Quality, Tallgrass-Prairie Forage, H.H. Köster, R.C. Cochran, E.S. Vanzant, G. St Jean, Evan C. Titgemeyer Jan 1995

Influence Of Degradable Intake Protein On Site And Extent Of Digestion In Beef Cows Consuming Low-Quality, Tallgrass-Prairie Forage, H.H. Köster, R.C. Cochran, E.S. Vanzant, G. St Jean, Evan C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

Five Angus x Hereford cow s with ruminal and duodenal fistulas were used to evaluate the effect of providing increasing degradable intake protein (DIP) o n the site and extent of digestion of dormant, tallgrass-prairie forage. The DIP was provided from sodium caseinate, divided in two equal portions and infused intraruminally twice daily. Levels of DIP were: 0, 180, 360, 540, and 720 g/day. Supplemental DIP generally improved utilization of low quality forage, with maximum effects on duodenal N flow and forage organic matter intake at 540 g DIP/day.


Influence Of Increasing Proportion Of Supplemental Nitrogen From Urea On Intake And Fermentation Characteristics In Beef Steers Consuming Low-Quality, Tallgrass-Prairie Forage, H.H. Köster, R.C. Cochran, E.S. Vanzant, K.K. Kreikemeier, G. St Jean, Evan C. Titgemeyer, Tiruvoor G. Nagaraja Jan 1995

Influence Of Increasing Proportion Of Supplemental Nitrogen From Urea On Intake And Fermentation Characteristics In Beef Steers Consuming Low-Quality, Tallgrass-Prairie Forage, H.H. Köster, R.C. Cochran, E.S. Vanzant, K.K. Kreikemeier, G. St Jean, Evan C. Titgemeyer, Tiruvoor G. Nagaraja

Kansas Agricultural Experiment Station Research Reports

Five ruminally and duodenally fistulated Angus x Hereford steers were used to determine intake and fermentation responses associated with increasing the proportion of supplemental degradable intake protein (DIP) provided by urea. Steers had free access to a dormant, tallgrass-prairie forage. The supplemental DIP was provided by sodium caseinate and (or) urea , at a level that was determined previously to optimize use of a similar forage. Supplemental DIP was balanced with corn starch to provide a final supplement of 40% crude protein. Percentages of DIP from urea were: 0, 25, 50, 75, and 100%. Supplements were given intraruminally. Increasing the percentage ...


Radiometric Measurement Of Forage Quantity, R.C. Cochran, G. Towne, K. C. Olson Jan 1995

Radiometric Measurement Of Forage Quantity, R.C. Cochran, G. Towne, K. C. Olson

Kansas Agricultural Experiment Station Research Reports

A 16-band multispectral radiometer (MSR) was used to measure the amount of forage biomass present on several dates in native tallgrass prairie pastures during the 1992 to 1994 growing seasons. Reflectance data collected with the MSR were used a s inputs for a neural network computer program. The neural network used the reflectance data to predict forage biomass. Biomass estimates made with the MSR were found to predict actual biomass, as measured by hand-clipping, across all plant growth stages with an error of approximately 6%. Radiometric determination of biomass is a reliable alternative to hand-clipping and can be accomplished in ...


Effects Of Grazing System And Use Of A Pasture-Phase Implant On Grazing And Finishing Performance Of Steers, Robert T. Brandt Jr., C.T. Milton, Clenton E. Owensby Jan 1995

Effects Of Grazing System And Use Of A Pasture-Phase Implant On Grazing And Finishing Performance Of Steers, Robert T. Brandt Jr., C.T. Milton, Clenton E. Owensby

Kansas Agricultural Experiment Station Research Reports

Results are presented from the first year of a 2-year study to evaluate the effects of grazing system (intensive-early stocking or IES vs season-long grazing or SLG) with or without a pasture-phase implant (Synovex-S®) on grazing and subsequent finishing performance. Compared to a SLG system, IES resulted in faster rate of gain on pasture and more beef produced per acre, although SLG resulted in greater total pasture gain per animal. Implanting improved rate of gain and increased beef per acre, particularly for IES steers. In the feedlot, IES steers gained weight faster and more efficiently than SLG steers. However, SLG ...


Wheat Middlings In High Concentrate Rations: Digestibility And Ruminal Metabolism, B.S. Dalke, K.K. Bolsen, R.N. Jr. Sonon, Matthew A. Young Jan 1995

Wheat Middlings In High Concentrate Rations: Digestibility And Ruminal Metabolism, B.S. Dalke, K.K. Bolsen, R.N. Jr. Sonon, Matthew A. Young

Kansas Agricultural Experiment Station Research Reports

Six medium-framed steers, fitted with ruminal cannulae were used in a 6 x 6 Latin square design and fed the following six high concentrat e (90%) rations: control; 5, 10, or 15% pelleted wheat middlings (WM) replacing the concentrate (dry rolled corn); and 5 or 10% pelleted WM replacing the roughage (chopped alfalfa hay). Dry matter (DM), organic matter (OM), and starch digestibilities decreased linearly when increasing levels of WM replaced the concentrate , but replacing the roughage increased DM and OM digestibilities linearly. WM could replace only up to 5 % of the concentrate without reducing nutrient digestibilities, but complete (10 ...


Feeder Cattle Price Differentials: How Much Did They Change Over Time?, J. Mintert, F. Brazle, J. Iii Sartwelle, R. Jr. Bolze, Michael R. Langemeier, Ted C. Schroeder Jan 1995

Feeder Cattle Price Differentials: How Much Did They Change Over Time?, J. Mintert, F. Brazle, J. Iii Sartwelle, R. Jr. Bolze, Michael R. Langemeier, Ted C. Schroeder

Kansas Agricultural Experiment Station Research Reports

Results from mathematical models of feeder cattle price/characteristics using data collected in Kansa s and Missouri in 1986/1987 and from 1993 using the same data collection and modeling procedures indicate that the implicit values of many feeder cattle characteristics changed over time. Characteristic values often changed whether their value was measured in dollars per hundredweight or as a percentage of the mean feeder p rice during the data collection period. Directional impacts of characteristics on feeder cattle price were generally consistent from 1986/1987 to 1993. These results imply that, as market conditions change, new feeder cattle price ...


How The Price Of Different Breeds Of Feeder Cattle Has Changed Over Time, F.K. Brazle, J.R. Mintert, J. Iii Sartwelle, R.P. Jr. Bolze, Ted C. Schroeder Jan 1995

How The Price Of Different Breeds Of Feeder Cattle Has Changed Over Time, F.K. Brazle, J.R. Mintert, J. Iii Sartwelle, R.P. Jr. Bolze, Ted C. Schroeder

Kansas Agricultural Experiment Station Research Reports

Data on feeder steer characteristics, breeds, and prices were collected in 1986/87 and 1993 at Kansas and Missouri feeder cattle auctions to identify changes in buyers' preferences for various breeds. Results from models of feeder steer price/characteristics indicate that the relative value of many breeds changed over time. Relative to Hereford steers, Angus, Hereford x Angus cross, Continental cross, and low percentage Brahman steers all gained in price from 1986/87 to 1993. Longhorn Cross steers' price declined relative to Hereford steers over the same time period.


Determinants Of Prices For Cow-Calf Pairs, J.L. Parcell, F.D. Hiner, Ted C. Schroeder Jan 1995

Determinants Of Prices For Cow-Calf Pairs, J.L. Parcell, F.D. Hiner, Ted C. Schroeder

Kansas Agricultural Experiment Station Research Reports

A study of price determinants for cow-calf pairs was undertaken at a local Kansas auction company during 1993. Cow breed, age, health, condition score, horns, frame size, and whether the cow h ad been bred back impacted cow-calf pair values, as well as calf weight, health, and frame score. Addition ally, pairs per pen significantly impacted prices. Young healthy cows with healthy large calves received the highest prices.


Kansas Environmental Regulations, Joseph P. Harner, L. Hess, James P. Murphy Jan 1995

Kansas Environmental Regulations, Joseph P. Harner, L. Hess, James P. Murphy

Kansas Agricultural Experiment Station Research Reports

The Kansas Department of Health and Environment (KDHE) enforces two different regulation s in the state of Kansas. One set of regulation s is from the Federal Environmental Protection Agency (EPA) and applies to larger operations. The other is a set of Kansas regulation s created by our state legislature for smaller operations. EPA regulations pertain to confined feeding operation s in excess of 1,000 animal units and require an EPA National Pollution Discharge Elimination System (NPDES) permit. Because an animal unit for the NPDES permit is defined as one beef animal, a feedlot with a capacity of 1 ...


Effect Of Bacterial Inoculants On The Preservation And Nutritive Value Of Whole-Plant Corn Silages, K.K. Bolsen, D.W. Rice, M.A. Hinds, C. Zimmermann, Matthew A. Young Jan 1995

Effect Of Bacterial Inoculants On The Preservation And Nutritive Value Of Whole-Plant Corn Silages, K.K. Bolsen, D.W. Rice, M.A. Hinds, C. Zimmermann, Matthew A. Young

Kansas Agricultural Experiment Station Research Reports

Inoculated and control corn silages were compare d using pilot-scale silos. Inoculated silages (Pioneer inoculant 117 4 and 1132) had significantly higher lactic to acetic acid ratios, and numerically lower values for DM loss, acetic acid, ethanol, and ammonia-nitrogen than the control silage"”evidence that both inoculants produced a more efficient fermentation . Although the inoculated silage rations had higher DM intakes than the control, nutrient digestibilities were similar for the three silages . These results are consistent with numerous studies that compared untreated and inoculant-treated silages over a wide range of crops and ensiling conditions in our research during the past ...


Agronomic Performance And Silage Quality Traits Of Forage Sorghum Hybrids In 1994, M.S. Mitchem, L. Pfaff, K.K. Bolsen, Matthew A. Young Jan 1995

Agronomic Performance And Silage Quality Traits Of Forage Sorghum Hybrids In 1994, M.S. Mitchem, L. Pfaff, K.K. Bolsen, Matthew A. Young

Kansas Agricultural Experiment Station Research Reports

The 1994 growing season was characterized by near norm al rainfall and temperatures. Both whole-plant DM and grain yields were excellent for all hybrid s. The middle-season Pioneer 947 hybrid had the highest grain yield. The two dual-purpose hybrids had the highest whole-plant DM yields, and the male sterile (Golden Harvest H-1) and the grain sorghum (DeKalb 42Y) had the lowest. Strong winds in the first week in September caused substantial lodging in three of the four tall middle- and late-season hybrids (DeKalb FS-5 and Golden Harvest H-2 and H-68). Two of the short height, dual purpose hybrids (Northrup King ...


Changes In Nutrient Content Of Rye, Triticale, And Wheat Whole-Plant Forages With Maturity, K.L. Hanson, R.S. Schalles, L.H. Harbers, Curtis R. Thompson Jan 1995

Changes In Nutrient Content Of Rye, Triticale, And Wheat Whole-Plant Forages With Maturity, K.L. Hanson, R.S. Schalles, L.H. Harbers, Curtis R. Thompson

Kansas Agricultural Experiment Station Research Reports

We compared upland and bottomland cereals seeded during 1991 at the KSU Agricultural Research Center - Hays. The five crops (three varieties of triticale, a winter wheat, and a winter rye) were harvested as whole plants during the latter part of the growing season. Crude protein (CP), ac id detergent fiber (ADF), and neutral detergent fiber (NDF) were estimated using near infrared spectroscopy. Compute r models were developed to describe nutrient changes. Crude protein content decreased whereas the two fiber components increased with maturity. Rye and wheat tended to have lower CP values when day 125 was used as the arbitrary ...


Effects Of Hot-Fat Trimming On Retail Display Color Of Three Beef Muscles, S.R. Stuewe, Donald H. Kropf, Melvin C. Hunt, R.E. Campbell, Curtis L. Kastner Jan 1995

Effects Of Hot-Fat Trimming On Retail Display Color Of Three Beef Muscles, S.R. Stuewe, Donald H. Kropf, Melvin C. Hunt, R.E. Campbell, Curtis L. Kastner

Kansas Agricultural Experiment Station Research Reports

Steaks from subprimal cuts from carcass sides that were either hot-fat-trimmed to .25 inch or not hot-f at-trimmed (control) were used to determine trimming effects on retail display color. After 14 days storage in vacuum bags at 30EF, subprimals were cut into 1-inch-thick steaks for evaluation. Specific muscles that were evaluated were the loin strip (longissimus lumborum) , inside round (semimembranosus only), an d the chuck clod (triceps brachii only). The steaks were packaged in polyvinylchloride (PVC) film and displayed. The loin strip steaks from hot-fat-trimmed sides were more discolored (P<.05) than from nontrimmed controls at 0, 3, and 4 days display, but both had acceptable color through 4 days of display. Treatments were not different for inside round steaks (P>.05) ; the deep location was less red (P<.05) than the location closer to the muscle surface. Chuck clod steaks were not affected by trimming (P>.05). The ...


Premature Browning In Cooked Ground Beef After Modifying Myoglobin, Melvin C. Hunt, K.E. Warren, Donald H. Kropf, M.A. Hague, C.L. Waldner, Sally L. Stroda, Curtis L. Kastner Jan 1995

Premature Browning In Cooked Ground Beef After Modifying Myoglobin, Melvin C. Hunt, K.E. Warren, Donald H. Kropf, M.A. Hague, C.L. Waldner, Sally L. Stroda, Curtis L. Kastner

Kansas Agricultural Experiment Station Research Reports

Some ground beef patties developed an internal, brown cooked color and looked well-done at temperatures as low as 131 ÌŠF, whereas normal patties were re d to pink. The premature brown color was not relate d to percent fat; patty compaction; animal source and maturity; pH (5.5 to 5.8); or concentrations of raw patty heme and nonhemeiron, myoglobin, and total pigment. Because oxidation-reduction potential and total reducing activities were higher (P<.05) and TBA numbers were lower (P<.05) in normal than prematurely brown patties, the brown color is apparently related to greater patty oxidation.


Relationships Between Weaning Weight, Maternal Weaning Weight, And Milk Production In Polled Hereford Cattle, J.B. Jr. Glaze, R.R. Schalles Jan 1995

Relationships Between Weaning Weight, Maternal Weaning Weight, And Milk Production In Polled Hereford Cattle, J.B. Jr. Glaze, R.R. Schalles

Kansas Agricultural Experiment Station Research Reports

Performance data from a Polled Hereford herd selected for improved feed conversion were used to calculate a variety of genetic parameters. Heritabilities were .14 for weaning wt, .18 for maternal weaning wt., and .19 for milk production. The genetic correlations were -.10 between weaning weight and maternal weaning weight and 0 between weaning weight and milk production. However, the genetic correlation between maternal weaning weight and milk was . 99, indicating they are essentially the same trait. Milk EPDs published by most breed associations are calculate d as the maternal weaning weight. Our study strongly supports this method of estimating an ...


Cash Operating Income And Liquidity Management For Dairy Farms, B.D. Elliott, Michael R. Langemeier, Allen M. Featherstone Jan 1995

Cash Operating Income And Liquidity Management For Dairy Farms, B.D. Elliott, Michael R. Langemeier, Allen M. Featherstone

Kansas Agricultural Experiment Station Research Reports

Net cash flow measures the amount of cash remaining after all cash expense obligations are satisfied. This cash is available for additional farm investment, off-farm investment, family living, and additional debt repayment. A 5- year average monthly cash flow statement was used to determine net cash flow for 19 Kansas dairy farms. Results indicated that excess cash and debt were used primarily to invest in machinery, vehicles, and nonfarm assets and increase the allocation for family living. Investments in land and buildings increased moderately during the study period.; Dairy Day, 1995, Kansas State University, Manhattan, KS, 1995;


Comparisons Of Commercial Frozen Yogurt With Ksu Formulation, J.H. Kim, I.J Jeon, M.S. Forbes, Karen A. Schmidt Jan 1995

Comparisons Of Commercial Frozen Yogurt With Ksu Formulation, J.H. Kim, I.J Jeon, M.S. Forbes, Karen A. Schmidt

Kansas Agricultural Experiment Station Research Reports

Ten samples of vanilla frozen yogurt were purchased in Kansas and compared to a highprotein, KSU formulation. The KSU formulation had similar solids, fat, and sugar contents as the commercial samples. All commercial samples had lower protein (almost less than half) content and more lactose, and almost all samples had fewer lactic acid bacteria than the KSU formulation. All but one commercial sample had lower b-galactosidase activity than the KSU formulation. This may reflect the differing lactic acid bacterial populations in the frozen yogurts.; Dairy Day, 1995, Kansas State University, Manhattan, KS, 1995;


Comparison Of Synchronized-Ovulation Protocols And Traditional Synchronized-Estrys Programs Using Prostaglandin F2(Α), Y. Kobayashi, Jeffrey S. Stevenson Jan 1995

Comparison Of Synchronized-Ovulation Protocols And Traditional Synchronized-Estrys Programs Using Prostaglandin F2(Α), Y. Kobayashi, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Five treatments were developed to compare a new synchronized ovulation protocol, which programs follicular development with the regression of the corpus luteum, and traditional prostaglandin protocols that only control the regression of the corpus luteum. The synchronized ovulation treatment, which requires no heat detection before a fixed-time insemination, tended to decrease pregnancy rates compared to a similar synchronized ovulation treatment in which inseminations occurred at a detected estrus (30 vs 50%). The traditional two-injection prostaglandin protocol that synchronized estrus by regression of the corpus luteum had a greater pregnancy rate (57%) than similar two-injection prostaglandin protocols in which gonadotropin-releasing hormone ...


Economics Of Using Rbst, John F. Smith Jan 1995

Economics Of Using Rbst, John F. Smith

Kansas Agricultural Experiment Station Research Reports

As new technologies such as rbST become available to dairy producers, evaluating the profitability of those technologies on individual farms is essential. Costs associated with rbST include purchase of product, feed, and labor. The costs of product and labor are independent of milk response. However, feed cost will increase as the milk production response to rbST increases. If the mailbox milk price is $10, approximately 7 lb more milk per day will be required to break even. It is essential that dairy producers have the management in place to achieve a profitable milk response to rbST.; Dairy Day, 1995, Kansas ...


Performance Of Cows In The Lactation Following Rbst Treatment, James R. Dunham Jan 1995

Performance Of Cows In The Lactation Following Rbst Treatment, James R. Dunham

Kansas Agricultural Experiment Station Research Reports

The first 305-2x-ME lactation record (after 45 days in milk) projected by the DHI program in 28 cows was not different from their first projected lactation record in a previous lactation in which recombinant bovine somatotropin (rbST) injections were begun by the 90th day of lactation. These results suggest when rbSTtreated cows are fed and managed properly during lactation and the dry period, no negative effect of rbST or so-called "burn out" occurs.; Dairy Day, 1995, Kansas State University, Manhattan, KS, 1995;


Management Strategies: Reproduction, John F. Smith, Jeffrey S. Stevenson Jan 1995

Management Strategies: Reproduction, John F. Smith, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Despite the negative effects of milk production on some reproductive traits, calving intervals between high- and low-producing groups varied by only 9 days (414 vs 423). First-service conception rates were 8 percentage points greater in the low-producing group than in the high-producing group. However, the percentage of cows not yet inseminated that were more than 120 days in milk was 18 percentage points greater in the low- than highproducing herds. When Kansas dairy herds in the DHIA program are evaluated, the higher producing herds seem to have lower firstservice conception rates and more services per conception. However, managers of high-producing ...


Field Day 1995, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service Jan 1995

Field Day 1995, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service

Kansas Agricultural Experiment Station Research Reports

Each Field Day report consists of individual research reports on topics specific to the region, including cultural methods for most of the major crops grown in Kansas, mitigating the effects of weeds, insects, and disease associated with those crops, and irrigation. Research is conducted and reports written by staff of the K-State Research and Extension Southwest Research Extension Center.


1995 Agricultural Research Southeast Agricultural Research Center, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service Jan 1995

1995 Agricultural Research Southeast Agricultural Research Center, Kansas State University. Agricultural Experiment Station And Cooperative Extension Service

Kansas Agricultural Experiment Station Research Reports

No abstract provided.


Display Life And Related Traits Of Low-Dose Irradiated, Boneless, Pork Chops, S E. Luchsinger, Zepeda C.M. Garcia, Edgar Iv Chambers, M E. Hollingsworth, Melvin C. Hunt, James L. Marsden, Sally L. Stroda, Canas E. Rubio J, Curtis L. Kastner, W G. Kuecker, T Mata, Donald H. Kropf Jan 1995

Display Life And Related Traits Of Low-Dose Irradiated, Boneless, Pork Chops, S E. Luchsinger, Zepeda C.M. Garcia, Edgar Iv Chambers, M E. Hollingsworth, Melvin C. Hunt, James L. Marsden, Sally L. Stroda, Canas E. Rubio J, Curtis L. Kastner, W G. Kuecker, T Mata, Donald H. Kropf

Kansas Agricultural Experiment Station Research Reports

Irradiation and vacuum-packaging caused a more intense and stable red color in boneless pork chops. Irradiation up to 2.5 kGy increased cooked internal redness in chilled chops. Oxidative rancidity was greater in aerobic packaging than vacuum-packaging and in irradiated aerobic packaged chops than controls. Irradiation of vacuum-packaged boneless pork chops has promising potential for market acceptance.; Swine Day, Manhattan, KS, November 16, 1995