Zobrazeno 1 - 10
of 442
pro vyhledávání: '"J W, Oltjen"'
Publikováno v:
Translational animal science, vol 6, iss 3
Till date, with over 137,000 certified members, the most successful rancher educational program has been the Beef Quality Assurance (BQA) program. The BQA program was established in the mid-1990’s to improve animal health and welfare with a primary
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ddfb6c6262d2b564b67e3aa091ee638
https://pubmed.ncbi.nlm.nih.gov/35919631
https://pubmed.ncbi.nlm.nih.gov/35919631
Autor:
C L, Ferrell, J W, Oltjen
Publikováno v:
Journal of Animal Science. 86:2779-2794
Development of nutritional energetics can be traced to the 1400s. Lavoisier established relationships among O(2) use, CO(2) production and heat production in the late 1700s, and the laws of thermodynamics and law of Hess were discovered during the 18
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::625ecd96375571802821e1157ef56397
https://doi.org/10.2527/jas.20080954
https://doi.org/10.2527/jas.20080954
Publikováno v:
Journal of animal science. 90(12)
Increased animal performance is suggested as one of the most effective mitigation strategies to decrease greenhouse gas (GHG) and ammonia (NH(3)) emissions from livestock production per unit of product produced. Little information exists, however, on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::3b913daf1f47c277de320d9ed60c98fc
https://pubmed.ncbi.nlm.nih.gov/22952364
https://pubmed.ncbi.nlm.nih.gov/22952364
Publikováno v:
Journal of animal science. 90(12)
Beef production is a recognized source of greenhouse gas (GHG) and ammonia (NH(3)) emissions; however, little information exists on the net emissions from beef production systems. A partial life cycle assessment (LCA) was conducted using the Integrat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::f8679eb7ee96b193fab4121c46ef3010
https://pubmed.ncbi.nlm.nih.gov/22952361
https://pubmed.ncbi.nlm.nih.gov/22952361
Autor:
T Z, Albertini, S R, Medeiros, R A A, Torres, S S, Zocchi, J W, Oltjen, A B, Strathe, D P D, Lanna
Publikováno v:
Journal of animal science. 90(11)
The objective of this study was to evaluate methods to predict the secretion of milk and net energy and protein requirements of beef cows (Bos indicus and B. taurus) after approximately 1 mo postpartum using nonlinear mixed-effect modeling (NLME). Tw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::c7e54478e4e87b271151656202be8a0a
https://pubmed.ncbi.nlm.nih.gov/22665632
https://pubmed.ncbi.nlm.nih.gov/22665632
Autor:
V. A. Thompson, J. G. Fadel, Luis Gustavo Barioni, Roberto Daniel Sainz, J. W. Oltjen, T. Rumsey
Publikováno v:
Modelling nutrient digestion and utilisation in farm animals ISBN: 9789086867127
We developed a model that simulates heat production and heat flow between the animal and its environment. Heat production is predicted using the Davis Growth Model (DGM), which in turn is based on the maintenance functions in NRC (2000). Heat flows b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31a81b0f024800f7612b279967eb80b6
https://doi.org/10.3920/978-90-8686-712-7_27
https://doi.org/10.3920/978-90-8686-712-7_27
Publikováno v:
Journal of animal science. 88(1)
Even though the concept of residual feed intake (RFI) is well accepted, several questions remain regarding other traits that may be associated with selection for decreased RFI. These include DM digestibility, carcass composition, profitability, and p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::8d38981c3d1a27872936b585fdf545b4
https://pubmed.ncbi.nlm.nih.gov/19749019
https://pubmed.ncbi.nlm.nih.gov/19749019
Interfacing CCFARM Simulation Engine with Microsoft Excel's VBA Engine to Generate On-Demand Outputs
Publikováno v:
Scopus-Elsevier
CCFARM is a computer program for simulating cow-calf herd dynamics over a long time horizon. One difficulty for most research-oriented simulation systems is its output interface which is written to be used by the researcher and not by ranchers. The P
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ee81e00d9171255cc5804e644e1fd78
https://doi.org/10.13031/2013.29095
https://doi.org/10.13031/2013.29095
Publikováno v:
Journal of animal science. 86(8)
The Davis growth model (DGM) simulates growth and body composition of beef cattle and predicts development of 4 fat depots. Model development and evaluation require quantitative data on fat weights, but sometimes it is necessary to use carcass data t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::75d254bafb830bc01dd12ccbddd6c5c2
https://pubmed.ncbi.nlm.nih.gov/18375668
https://pubmed.ncbi.nlm.nih.gov/18375668
Autor:
J. W. Oltjen, M. J. McPhee, P. deVoil, Jeroen C.J. Groot, Walter A.H. Rossing, David G. Mayer
Publikováno v:
Studies in Computational Intelligence ISBN: 9783540762850
To remain competitive, many agricultural systems are now being run along business lines. Systems methodologies are being incorporated, and here evolutionary computation is a valuable tool for identifying more profitable or sustainable solutions. Howe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::716b1c4f5c25ea9ebbf5b0444f0790a8
https://doi.org/10.1007/978-3-540-76286-7_7
https://doi.org/10.1007/978-3-540-76286-7_7