Browsing Dairy by Title

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Browsing Dairy by Title

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  • Harner, Joseph P.; Smith, J.F. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2009)
    Performance of an evaporative cooling system was evaluated in the High Plains in a low-profile, cross-ventilated dairy facility housing 4,200 lactating cows. The temperature decrease across the 6-inch cellulose evaporative ...
  • Martel, C.A; Buttery, B.S.; Burns, M.G.; Brown, W.E.; Stevenson, Jeffrey S. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2007)
    Our objective was to determine the effectiveness of exogenous progesterone in the form of an intravaginal insert (controlled internal drug release, CIDR) in conjunction with an ovulation synchronization protocol in lactating ...
  • Stevenson, Jeffrey S. (Kansas Agricultural Experiment Station, 1988)
    A recent survey of calvings of dairy heifers and cows revealed that fall calvings occurred in a nonrandom pattern. The survey was conducted in a large 5,000-cow herd in which pregnant females were watched 24 hr/day. Fewer ...
  • Schmidt, D.G.; Gnad, D.P.; Sargeant, J.M.; Shirley, John E. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2000)
    Total blood protein measured in calves between 1 and 7 days of age is a good indicator of the sufficiency of colostral intake and level of immunity passed to the calf. This measurement can be used to improve calf management ...
  • Terui, H.; Morrill, J.L.; Higgins, James J. (Kansas Agricultural Experiment Station, 1994)
    Total mixed rations (TMR) with different forage (F):concentrate (C) ratios were fed to Holstein heifers (n = 135) 12 to 24 wk of age. In four trials, the heifers were divided into different age groups and fed three ...
  • Harner, Joseph P.; Murphy, James P.; Smith, J.F. (Kansas Agricultural Experiment Station and Cooperative Extension Service., 1998)
    Flushing characteristics of a tower tank valve flushing system with a 12-inch-diameter manual valve were determined. Data were obtained using the outside cow alleys in a fourrow freestall barn. The alleys were 12 ft ...
  • Shirley, John E. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2003)
    Dairy cows are generally provided with a 60-day dry period. The first part of the dry period is called the “far-off dry period” beginning at dry off and continuing until 21 days before projected calving date. The second ...
  • Stevenson, Jeffrey S. (Kansas Agricultural Experiment Station, 1987)
    In three of six studies involving over 1,650 cows, treatment of lactating dairy cows with 100 µg GnRH (2 cc Cystorelin®) at the time of third or fourth insemination improved conception rates by 12 percentage points. When ...
  • Stevenson, Jeffrey S.; Call, Edward P. (Kansas Agricultural Experiment Station, 1987)
    Poor heat detection is a major cause of reproductive failure in most dairy herds. About one-half of the heat periods are undetected, resulting in prolonged calving intervals. In many cases, the problem is serious enough ...
  • Stevenson, Jeffrey S. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2005)
    Use of timed AI programs has become commonplace on most dairy farms either because cows are not watched sufficiently to detect estrus, or because expression of estrus is limited by confinement housing. A number of ...
  • Call, Edward P. (Kansas Agricultural Experiment Station, 1987)
    USDA-DHIA Sire Summaries are published semiannually and provide the dairy industry with an accurate evaluation of the transmitting ability of bulls for milk and milk components. Genetic potential is established at the ...
  • Estrada, J.; Shirley, John E. (Kansas Agricultural Experiment Station, 1989)
    We all have heard about the use of BST in lactating dairy cattle during the last 6 to 8 years, but what is BST? Bovine somatotropin is another dairy management tool developed to improve the efficiency and reduce the cost ...
  • Dawson, D.P.; Morrill, J.L.; Reddy, P.G.; Behnke, Keith C. (Kansas Agricultural Experiment Station, 1987)
    Oil-extracted, desolveritized soy flour without additional heat treatment was used to prepare protein supplements for calf milk replacers by extrusion processing. Various combinations of temperature, moisture, calcium ...
  • Kobayashi, Y.; Stevenson, Jeffrey S. (Kansas Agricultural Experiment Station, 1994)
    Holstein cows and virgin heifers were treated with GnRH and PGF in a novel 2a ovulation synchronization protocol, which involves one fixed-time insemination. One injection of GnRH is given on a Monday morning, followed ...
  • Stevenson, Jeffrey S.; Pursley, J. R. (Kansas Agricultural Experiment Station, 1993)
    Holstein cows milked twice daily were assigned to be inseminated at their first detected estrus (control) after 42 days in milk or received PGFza (PG) after 42 days, if they had a high milk progesterone (P4) test on ...
  • Sargeant, J. M.; Pulkrabek, B. J.; Scheffel, Michael V.; Park, A. F.; Shirley, John E. (Kansas Agricultural Experiment Station and Cooperative Extension Service, 1999)
    The dynamics of somatic cell counts during the first 10 days in milk were compared among udder quarters of cows with intra-mammary infection at the time of calving and those with no infection present. The study group ...
  • Heikes, K.A. (Kansas Agricultural Experiment Station, 1986)
    For maximal genetic progress in a dairy, proven AI sires should be selected to use on replacement heifers. To minimize problems at calving, these sires should be selected from bulls that are breed average or better for ...
  • Stevenson, Jeffrey S. (Kansas Agricultural Experiment Station and Cooperative Extension Service, 1999)
    Using the Ovsynch protocol to prepare cows for re-insemination proved to be very effective. Its use guarantees that all cows found open at pregnancy diagnosis are reinseminated promptly within 10 days, and the average ...
  • Dunham, James R. (Kansas Agricultural Experiment Station, 1996)
    High-producing dairy herds can consistently average a somatic cell count (SCC) <200,000. Herds with consistently higher averages can decrease SCC and realize higher profits. The SCC report discloses the pitfalls that ...
  • Cvetkovic, B.; Smith, J.F.; Harner, Joseph P.; Brouk, Michael J. (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service, 2005)
    A rise in body temperature is a signal that heat stress has exceeded the heat-exchange capacity of the dairy cow. Previous studies have shown a strong positive correlation between vaginal temperature and respiration rate, ...