PubAg

Main content area

You searched for: Subject "farms" Remove constraint Subject: "farms" Journal Journal of dairy science Remove constraint Journal: Journal of dairy science Publication Year 2018 Remove constraint Publication Year: 2018 Text Availability Citation in PubAg Remove constraint Text Availability: Citation in PubAg
Start Over

Search

147  Search Results

« Previous | 1 - 20 of 147 |
Number of results to display per page

Search Results

1. Silage review: Factors affecting dry matter and quality losses in silages

Author:
Borreani, G.; Tabacco, E.; Schmidt, R.J.; Holmes, B.J.; Muck, R.E.
Source:
Journal of dairy science 2018 v.101 no.5 pp. 3952-3979
ISSN:
0022-0302
Subject:
farms,   etc   ; air; fermentation; livestock production; silage; silage making; temperature;     Show all 7 Subjects
Abstract:
... An overview was made of dry matter (DM) and quality losses that occur during the ensiling process from the field through the feeding phase. The aim was to review the relevant published literature of the last 15 yr focusing on developments achieved after the publication of the book Silage Science and Technology. This review discusses the factors affecting DM and quality losses in terms of field and ...
DOI:
10.3168/jds.2017-13837

2. Factors associated with high antimicrobial use in young calves on Dutch dairy farms: A case-control study

Author:
Holstege, M.M.C.; de Bont-Smolenaars, A.J.G.; Santman-Berends, I.M.G.A.; van der Linde-Witteveen, G.M.; van Schaik, G.; Velthuis, A.G.J.; Lam, T.J.G.M.
Source:
Journal of dairy science 2018 v.101 no.10 pp. 9259-9265
ISSN:
0022-0302
Subject:
dairy farm management; farms,   etc   ; Salmonella; anti-infective agents; attitudes and opinions; calves; case-control studies; farmers; floors; herd size; hygiene; mortality; questionnaires; respiratory tract diseases; vaccination; veterinary medicine;     Show all 16 Subjects
Abstract:
... Since 2012, the Dutch Veterinary Medicine Authority reports antimicrobial usage (AMU) in young calves (<56 d) on dairy farms on an annual basis. The AMU distribution in this age group is skewed, with a low AMU in young calves on the majority of dairy farms and a high AMU in a relatively small number of farms. This results in a notable difference between the mean and median AMU. To further reduce t ...
DOI:
10.3168/jds.2017-14252

3. A national methodology to quantify the diet of grazing dairy cows

Author:
O'Brien, D.; Moran, B.; Shalloo, L.
Source:
Journal of dairy science 2018 v.101 no.9 pp. 8595-8604
ISSN:
0022-0302
Subject:
farm surveys; farms,   etc   ; body weight; cattle feeds; dairy cows; dairy farming; diet; dry matter intake; energy requirements; forage; grazing; milk; milk production; pregnancy; purchasing; rumen; spring; summer; Ireland;     Show all 19 Subjects
Abstract:
... The unique rumen of dairy cows allows them to digest fibrous forages and feedstuffs. Surprisingly, to date few attempts have been made to develop national methods to gain an understanding on the make-up of a dairy cow's diet, despite the importance of milk production. Consumer interest is growing in purchasing milk based on the composition of the cows' diet and the time they spend grazing. The goa ...
DOI:
10.3168/jds.2017-13604

4. Mating strategies to maximize genetic merit in dairy cattle herds

Author:
Johnson, T.; Eketone, K.; McNaughton, L.; Tiplady, K.; Voogt, J.; Sherlock, R.; Anderson, G.; Keehan, M.; Davis, S.R.; Spelman, R.J.; Chin, D.; Couldrey, C.
Source:
Journal of dairy science 2018 v.101 no.5 pp. 4650-4659
ISSN:
0022-0302
Subject:
farm management; farms,   etc   ; breeding; bulls; calves; cows; dairy cattle; dairy herds; decision making; farmers; genetic improvement; genetic merit; heifers; teams; New Zealand;     Show all 15 Subjects
Abstract:
... The genetic merit of a herd is a key determinant in productivity for dairy farmers. However, making breeding decisions to maximize the rate of genetic gain can be complex because there is no certainty about which cows will become pregnant with a heifer calf. In this study, breeding worth (BrW) was used as a measure of genetic merit, and several mating strategies were evaluated. These strategies in ...
DOI:
10.3168/jds.2017-13538

5. The extent that certain dairy farmer attitudes and behaviors are associated with farm business profitability

Author:
O'Leary, N.W.; Bennett, R.M.; Tranter, R.B.; Jones, P.J.
Source:
Journal of dairy science 2018 v.101 no.12 pp. 11275-11284
ISSN:
0022-0302
Subject:
farms,   etc   ; attitudes and opinions; farmers; models; personality; profitability; purchasing; regression analysis; sociodemographic characteristics; temperament; Great Britain;     Show all 11 Subjects
Abstract:
... The way in which farm managers' attitudes, personality, behavior, values, and sociodemographic characteristics influence farm business performance is, at best, only partially understood. The study reported here expands on this understanding by analyzing the attitudes and personal attributes of 80 dairy farmers in Great Britain in relation to the profitability over 3 yr of their farm businesses. Bu ...
DOI:
10.3168/jds.2017-14307

6. Short communication: The effect of calcium supplementation at calving on neutrophil function

Author:
Miltenburg, Cynthia L.; Duffield, Todd F.; Bienzle, Dorothee; Scholtz, Elizabeth L.; LeBlanc, Stephen J.
Source:
Journal of dairy science 2018 v.101 no.10 pp. 9505-9509
ISSN:
0022-0302
Subject:
farms,   etc   ; blood sampling; blood serum; calcium; calcium gluconate; calving; cows; lactation number; neutrophils; phagocytosis; risk factors;     Show all 11 Subjects
Abstract:
... Low total blood calcium concentration after calving has been demonstrated to be a risk factor for reduced neutrophil function. The objective of this study was to evaluate whether administration of an injectable calcium supplement product soon after calving increased neutrophil oxidative burst or phagocytosis capacity. Cows (n = 27) from 4 farms were blocked by parity and randomly assigned to recei ...
DOI:
10.3168/jds.2018-14839

7. Influence of milk yield on profitability—A quantile regression analysis

Author:
Schorr, Anke; Lips, Markus
Source:
Journal of dairy science 2018 v.101 no.9 pp. 8350-8368
ISSN:
0022-0302
Subject:
farms,   etc   ; cows; dairy farming; extension education; income; milk yield; models; profitability; regression analysis;     Show all 9 Subjects
Abstract:
... This paper analyzes the factors that influence the economic success of Swiss dairy farms, as measured by the annual income per family work unit, using panel data regression techniques. Based on more than 5,400 farm-year observations, the main focus of the analysis concerns the milk yield per cow and year as the key explanatory variable, which can be adjusted by the farm manager in the medium term. ...
DOI:
10.3168/jds.2018-14434

8. Delaying investments in sensor technology: The rationality of dairy farmers' investment decisions illustrated within the framework of real options theory

Author:
Rutten, C.J.; Steeneveld, W.; Oude Lansink, A.G.J.M.; Hogeveen, H.
Source:
Journal of dairy science 2018 v.101 no.8 pp. 7650-7660
ISSN:
0022-0302
Subject:
farms,   etc   ; automation; body condition; dairy cows; dairy farming; estrus detection; farmers; markets; models; uncertainty;     Show all 10 Subjects
Abstract:
... The adoption rate of sensors on dairy farms varies widely. Whereas some sensors are hardly adopted, others are adopted by many farmers. A potential rational explanation for the difference in adoption may be the expected future technological progress in the sensor technology and expected future improved decision support possibilities. For some sensors not much progress can be expected because the t ...
DOI:
10.3168/jds.2017-13358

9. Evaluation by employees of employee management on large US dairy farms

Author:
Durst, Phillip T.; Moore, Stanley J.; Ritter, Caroline; Barkema, Herman W.
Source:
Journal of dairy science 2018 v.101 no.8 pp. 7450-7462
ISSN:
0022-0302
Subject:
farms,   etc   ; dairy farming; equipment; human resources; learning; livestock; managers; milking; questionnaires; teams; United States;     Show all 11 Subjects
Abstract:
... Employees, many of whom are not native English speakers, perform the majority of work on large US dairy farms. Although management of employees is a critical role of dairy owners and managers, factors that improve employee engagement and retention are not well known. Objectives were to (1) identify key dairy farm employee management issues based on employee perceptions, (2) evaluate strengths and ...
DOI:
10.3168/jds.2018-14592

10. Use of on-farm emergency slaughter for dairy cows in British Columbia

Author:
Koralesky, Katherine E.; Fraser, David
Source:
Journal of dairy science 2018 v.101 no.7 pp. 6413-6418
ISSN:
0022-0302
Subject:
farms,   etc   ; calving; dairy cows; guidelines; hemorrhage; hips; lameness; meat; nerve tissue; slaughter; slaughterhouses; transportation; British Columbia;     Show all 13 Subjects
Abstract:
... On-farm emergency slaughter (OFES), whereby inspection, stunning, and bleeding occur on the farm before the carcass is transported to a slaughterhouse, is permitted in some jurisdictions as a means to avoid inhumane transportation while salvaging meat from injured animals. However, OFES is controversial and its use for dairy cows has been little studied. Inspection documents for 812 dairy cows wer ...
DOI:
10.3168/jds.2017-14320

11. Short communication: The effect of temperature-humidity index on milk yield and milking frequency of dairy cows in pasture-based automatic milking systems

Author:
Wildridge, Ashleigh M.; Thomson, Peter C.; Garcia, Sergio C.; John, Alex J.; Jongman, Ellen C.; Clark, Cameron E.F.; Kerrisk, Kendra L.
Source:
Journal of dairy science 2018 v.101 no.5 pp. 4479-4482
ISSN:
0022-0302
Subject:
farms,   etc   ; cooling; dairy cows; heat stress; infrastructure; milk yield; milking frequency; milking machines; summer; weather; Australia;     Show all 11 Subjects
Abstract:
... Hot weather is known to negatively affect cow performance primarily through reduced feed intake and milk yield. However, little information is available on how it affects cow milk yield and milking frequency in automatic milking systems (AMS). Milking data were collected from 6 pasture-based AMS farms in Australia to assess the effect of temperature-humidity index (THI) on milk yield and milking f ...
DOI:
10.3168/jds.2017-13867

12. Silage review: Interpretation of chemical, microbial, and organoleptic components of silages

Author:
Kung, Limin; Shaver, R.D.; Grant, R.J.; Schmidt, R.J.
Source:
Journal of dairy science 2018 v.101 no.5 pp. 4020-4033
ISSN:
0022-0302
Subject:
net farm income,   etc   ; animal performance; energy; fermentation; forage; nutrients; sensory properties; silage; silos;     Show all 9 Subjects
Abstract:
... The goal of making silage is to produce a stable feed with a high recovery of dry matter, energy, and highly digestible nutrients compared with the fresh crop. Microbial fermentation in the silo produces an array of end products and can change many nutritive aspects of a forage. High-quality silage should be void of undesirable compounds that could negatively affect animal performance, the environ ...
DOI:
10.3168/jds.2017-13909

13. How benchmarking motivates farmers to improve dairy calf management

Author:
Sumner, Christine L.; von Keyserlingk, Marina A.G.; Weary, Daniel M.
Source:
Journal of dairy science 2018 v.101 no.4 pp. 3323-3333
ISSN:
0022-0302
Subject:
farms,   etc   ; colostrum; dairy calves; farmers; hunger; milk; passive immunity; qualitative analysis; British Columbia;     Show all 9 Subjects
Abstract:
... Dairy calves often receive inadequate colostrum for successful transfer of passive immunity and inadequate milk to achieve their potential for growth and avoid hunger, but little is known about what motivates farmers to improve calf management around these concerns. Our aim was to assess if and how access to benchmarking reports, providing data on calf performance and peer comparison, would change ...
DOI:
10.3168/jds.2017-13596

14. Does clinical mastitis in the first 100 days of lactation 1 predict increased mastitis occurrence and shorter herd life in dairy cows?

Author:
Hertl, J.A.; Schukken, Y.H.; Tauer, L.W.; Welcome, F.L.; Gröhn, Y.T.
Source:
Journal of dairy science 2018 v.101 no.3 pp. 2309-2323
ISSN:
0022-0302
Subject:
farms,   etc   ; Holstein; Poisson distribution; calving; dairy cows; farmers; herds; lactation; mastitis; statistical models; New York;     Show all 11 Subjects
Abstract:
... The objectives of this study were to estimate the direct effects of clinical mastitis (CM) occurring in early productive life (defined as the first 100 d of the first lactation) of Holstein dairy cows on the future rate of CM occurrence and on the length of total productive lifetime. Information on CM cases and other data occurring in 55,144 lactations in 24,831 cows in 5 New York State Holstein h ...
DOI:
10.3168/jds.2017-12615

15. Evaluation of agreement among digital dermatitis scoring methods in the milking parlor, pen, and hoof trimming chute

Author:
Cramer, G.; Winders, T.; Solano, L.; Kleinschmit, D.H.
Source:
Journal of dairy science 2018 v.101 no.3 pp. 2406-2414
ISSN:
0022-0302
Subject:
farms,   etc   ; dairy cows; dermatitis; feet; free stalls; hoof trimming; milking parlors; monitoring; washing;     Show all 9 Subjects
Abstract:
... Digital dermatitis (DD) is the most common infectious foot lesion affecting welfare and productivity of dairy cattle. The key to DD control programs is routine and frequent identification of DD lesions. The objective was to evaluate accuracy of detecting and scoring DD lesions in 3 milking parlor designs and in 3 alternative settings compared with scoring in the hoof trimming chute as reference. A ...
DOI:
10.3168/jds.2017-13755

16. Describing temporal variation in reticuloruminal pH using continuous monitoring data

Author:
Denwood, M.J.; Kleen, J.L.; Jensen, D.B.; Jonsson, N.N.
Source:
Journal of dairy science 2018 v.101 no.1 pp. 233-245
ISSN:
0022-0302
Subject:
farms,   etc   ; dairy cows; diurnal variation; dry matter intake; herds; milk yield; monitoring; pH; statistical models;     Show all 9 Subjects
Abstract:
... Reticuloruminal pH has been linked to subclinical disease in dairy cattle, leading to considerable interest in identifying pH observations below a given threshold. The relatively recent availability of continuously monitored data from pH boluses gives new opportunities for characterizing the normal patterns of pH over time and distinguishing these from abnormal patterns using more sensitive and sp ...
DOI:
10.3168/jds.2017-12828

17. Calf care personnel on dairy farms and their educational opportunities

Author:
Sischo, W.M.; Moore, D.A.; Pereira, R.; Warnick, L.; Moore, D.L.; Vanegas, J.; Kurtz, S.; Heaton, K.; Kinder, D.; Siler, J.; Davis, M.A.
Source:
Journal of dairy science 2018
ISSN:
0022-0302
Subject:
farm size; farms,   etc   ; animal care; animal health; calves; continuing education; dairy farming; dairy herds; demographic statistics; herd size; higher education; human resources; interviews; languages; managers; play activities; veterinarians; Arizona; Idaho; New York; Oregon; Washington (state);     Show all 22 Subjects
Abstract:
... As dairy herd sizes become larger and the organization of the business more complex, targeting communication and education to enhance animal care becomes more difficult. The purpose of this study was to describe selected demographics of calf care employees on large (>500 animals) and small (<501 animals) dairy farms that raise their own calves. Two to 8 individuals per farm involved with calf care ...
DOI:
10.3168/jds.2018-15401

18. Effect of age of introduction to an automated milk feeder on calf learning and performance and labor requirements

Author:
Medrano-Galarza, Catalina; LeBlanc, Stephen J.; DeVries, Trevor J.; Jones-Bitton, Andria; Rushen, Jeffrey; Marie de Passillé, Anne; Endres, Marcia I.; Haley, Derek B.
Source:
Journal of dairy science 2018 v.101 no.10 pp. 9371-9384
ISSN:
0022-0302
Subject:
farm labor; farms,   etc   ; Holstein; automation; average daily gain; bulls; colostrum; confidence interval; dairy calves; diarrhea; group housing; heifers; human resources; learning; milk; milk consumption; milk replacer; odds ratio; risk; straw; weight gain;     Show all 21 Subjects
Abstract:
... Group housing of dairy calves with automated milk feeders (AMF) is increasingly being used, but the effect of introducing calves to the AMF at a very young age (<24 h) on calf performance, health, and welfare, as well as farm personnel labor requirements are unknown. The objective of this controlled trial was to investigate whether early (<24 h after birth) introduction of calves affects the time ...
DOI:
10.3168/jds.2018-14390

19. Measuring labor input on pasture-based dairy farms using a smartphone

Author:
Deming, J.; Gleeson, D.; O'Dwyer, T.; Kinsella, J.; O'Brien, B.
Source:
Journal of dairy science 2018 v.101 no.10 pp. 9527-9543
ISSN:
0022-0302
Subject:
farm labor; farms,   etc   ; European Union; calving; contractors; cows; dairies; dairy farming; dairy herds; feed prices; herd size; milk; milk production; milking; mobile telephones; pastures; seasonal variation; spring; winter; Ireland;     Show all 20 Subjects
Abstract:
... With the cessation of milk quotas in the European Union, dairy herd sizes increased in some countries, including Ireland, with an associated increase in labor requirement. Second to feed costs, labor has been identified as one of the highest costs on pasture-based dairy farms. Compared with other European Union countries, Ireland has historically had low milk production per labor unit; thus, optim ...
DOI:
10.3168/jds.2017-14288

20. An economic evaluation of management strategies to mitigate the negative effect of twinning in dairy herds

Author:
Mur-Novales, R.; Lopez-Gatius, F.; Fricke, P.M.; Cabrera, V.E.
Source:
Journal of dairy science 2018 v.101 no.9 pp. 8335-8349
ISSN:
0022-0302
Subject:
farm profitability; farms,   etc   ; calves; dairy cows; dairy farming; dairy herds; econometric models; economic evaluation; economic impact; endometritis; feed prices; heifers; income; induced abortion; lactation; milk; placenta; pregnancy; probability; protocols; retained placenta; slaughter; United States;     Show all 23 Subjects
Abstract:
... Our objectives were to develop an economic model to estimate the economic impact of twinning in dairy cows and to evaluate management strategies to mitigate the negative economic impact of twinning in dairy herds. A probabilistic tree considering spontaneous embryo reduction, early pregnancy loss, abortion, metritis, retained placenta, and culling rate at 120 d of the second, at the end of the sec ...
DOI:
10.3168/jds.2018-14400