Zobrazeno 1 - 10
of 78
pro vyhledávání: '"D.V. Armstrong"'
Autor:
F. Wiersma, D.V. Armstrong
Publikováno v:
Agricultural Engineering ISBN: 9781003211471
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aed41803d831835b7db2855383054090
https://doi.org/10.1201/9781003211471-89
https://doi.org/10.1201/9781003211471-89
Impact of frequency of feedline soaking combined with evaporative air cooling in a humid environment
Autor:
D.R. Bray, John F. Smith, Matthew VanBaale, Joseph P. Harner, D.V. Armstrong, Michael J. Brouk
Publikováno v:
Kansas Agricultural Experiment Station Research Reports. :4-8
Heat stress in hot and humid environments reduces milk production, decreases reproduction, and increases health-related problems. The summertime environment in north-central Florida is especially difficult because the combination of high relative hum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67459ed78c7674754443f09cabf638a5
https://doi.org/10.4148/2378-5977.3200
https://doi.org/10.4148/2378-5977.3200
Autor:
D.V. Armstrong, Christine M. Howison, Abelardo Correa-Calderon, Mark Enns, D. E. Ray, Sue K. DeNise
Publikováno v:
International Journal of Biometeorology. 48:142-148
Thirty-seven Holstein and 26 Brown Swiss dairy cows were used to evaluate the effect of two different cooling systems on physiological and hormonal responses during the summer. A control group of cows had access only to shade (C). A second group was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a308e2d671c9c45d6ede7521b1cc4388
https://doi.org/10.1007/s00484-003-0194-y
https://doi.org/10.1007/s00484-003-0194-y
Publikováno v:
Kansas Agricultural Experiment Station Research Reports. :22-25
Ten multiparous lactating Holstein cows were arranged in a replicated 5 × 5 Latin Square design to evaluate the effect of soaking frequency and volume of water per soaking on lactating cows housed in a tunnel-ventilated and evaporative-cooled freest
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::250b2535382900e6249b9d04d9758346
https://doi.org/10.4148/2378-5977.3177
https://doi.org/10.4148/2378-5977.3177
Publikováno v:
Journal of Dairy Science. 83:1451-1455
Some dairy producers resist using bovine somatotropin (bST) beginning at 9 wk postpartum because of the concern that fertility is compromised. We conducted a trial with a total of 205 Holstein cows, 100 multiparous and 105 primiparous, to evaluate re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed6074473694b82f6309fd9c552a7d89
https://doi.org/10.3168/jds.s0022-0302(00)75016-8
https://doi.org/10.3168/jds.s0022-0302(00)75016-8
Publikováno v:
Theriogenology. 51:1587-1596
There are a number of options for hormonal management of post partum dairy cows; however, only a few studies have made direct comparisons of these programs in commercial herd settings. We compared reproductive management programs of 2 commercial dair
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe5ed4aab8f3fbdf9f9ab5fe0159e0f3
https://doi.org/10.1016/s0093-691x(99)00101-6
https://doi.org/10.1016/s0093-691x(99)00101-6
Autor:
M. J. Gamroth, M. J. Meyer, John F. Smith, D. Putnam, G. Bethard, Joseph P. Harner, G. Boomer, D.V. Armstrong, Michael J. Brouk
Publikováno v:
Kansas Agricultural Experiment Station Research Reports. :46-58
Relocating or expanding a dairy facility requires a tremendous amount of time and planning. Owners or managers of dairies will go through a number of steps including: 1) developing a business plan; 2) choosing a design process; 3) developing specific
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e74241883922b53613bfd819134f69b
https://doi.org/10.4148/2378-5977.2952
https://doi.org/10.4148/2378-5977.2952
Publikováno v:
Journal of Dairy Science. 80:1866-1871
This paper focuses on large dairies that want to expand and milk more cows through an existing parlor or by building a new parlor. The expansion process can be divided into the following three phases: 1) financial evaluation, 2) design, and 3) constr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3e5d5284745207737be5cb8f69b88373
https://doi.org/10.3168/jds.s0022-0302(97)76122-8
https://doi.org/10.3168/jds.s0022-0302(97)76122-8
Autor:
L.S. Daugherty, D.V. Armstrong
Publikováno v:
Computers and Electronics in Agriculture. 17:123-128
This paper discusses some of the factors which will contribute to the rate of adoption of the robotic milking system by large dairy farms in the United States, if and when current mechanical problems regarding machine attachment and voluntary cow ent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b61dfb5675f43121745879b399935ee
https://doi.org/10.1016/s0168-1699(96)01221-5
https://doi.org/10.1016/s0168-1699(96)01221-5
Publikováno v:
The Professional Animal Scientist. 21:521-523
Ninety-eight multiparous and 60 primiparous Holsteins were utilized in an extended lighting trial to investigate effects of photoperiod on milk yield. After parturition, all animals were housed in one pen until 20 d in milk under normal daylight/nigh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68742122178733e5770e35686da0ec6a
https://doi.org/10.15232/s1080-7446(15)31258-4
https://doi.org/10.15232/s1080-7446(15)31258-4