Works by Oltjen, J. W.

Results: 27

BeefTrader: Optimal economical endpoint decision support system for feedlots and meat packers.

Published in:

2017

By:

Albertini, T. Z.;
Biase, A. G.;
Barbosa, M.;
Cerqueira, A. G.;
Gonçalves, H. C.;
Barioni, L. G.;
Caixeta-Filho, J. V.;
Péra, T. G.;
Dias, C. T. D. S.;
Medeiros, S. R.;
Oltjen, J. W.;
Nepomuceno, N. H. C.;
Lanna, D. P. D.

Publication type:

Abstract

Life cycle assessment of sheep meat and wool production in Northern California.

Published in:

2017

By:

Dougherty, H. C.;
Oltjen, J. W.;
Mitloehner, F. M.;
Rodrigues, K. A.;
Kebreab, E.

Publication type:

Abstract

Predicting fat, lean and the weights of primal cuts for growing pigs of different genotypes and sexes using computed tomography.

Published in:

Journal of Animal Science, 2015, v. 93, n. 3, p. 1388, doi. 10.2527/jas.2014-8697

By:

Carabús, A.;
Sainz, R. D.;
Oltjen, J. W.;
Gispert, M.;
Font-i-Furnols, M.

Publication type:

Article

Growth-promoting technologies decrease the carbon footprint, ammonia emissions, and costs of California beef production systems.

Published in:

Journal of Animal Science, 2012, v. 90, n. 12, p. 4656, doi. 10.2527/jas.2011-4654

By:

Stackhouse, K. R.;
Rotz, C. A.;
Oltjen, J. W.;
Mitloehner, F. M.

Publication type:

Article

Carbon footprint and ammonia emissions of California beef production systems.

Published in:

Journal of Animal Science, 2012, v. 90, n. 12, p. 4641, doi. 10.2527/jas.2011-4653

By:

Stackhouse-Lawson, K. R.;
Rotz, C. A.;
Oltjen, J. W.;
Mitloehner, F. M.

Publication type:

Article

Estimating feed efficiency: Evaluation of mathematical models to predict individual intakes of steers fed in group pens.

Published in:

Journal of Animal Science, 2011, v. 89, n. 5, p. 1640, doi. 10.2527/jas.2010-3416

By:

Cruz, G. D.;
Trovo, J. B.;
Oltjen, J. W.;
Sainz, R. D.

Publication type:

Article

Performance, residual feed intake, digestibility, carcass traits, and profitability of Angus-Hereford steers housed in individual or group pens.

Published in:

Journal of Animal Science, 2010, v. 88, n. 1, p. 324, doi. 10.2527/jas.2009-1932

By:

Cruz, G. D.;
Rodriguez-Sánchez, J. A.;
Oltjen, J. W.;
Sainz, R. D.

Publication type:

Article

ASAS CENTENNIAL PAPER: Net energy systems for beef cattle—Concepts, application, and future models.

Published in:

Journal of Animal Science, 2008, v. 86, n. 10, p. 2779, doi. 10.2527/jas.20080954

By:

Ferrell, C. L.;
Oltjen, J. W.

Publication type:

Article

Development and evaluation of empirical equations to interconvert between twelfth-rib fat and kidney, pelvic, and heart fat respective fat weights and to predict initial conditions of fat deposition models for beef cattle.

Published in:

Journal of Animal Science, 2008, v. 86, n. 8, p. 1984, doi. 10.2527/jas.2008-0840

By:

McPhee, M. J.;
Oltjen, J. W.;
Fadel, J. G.;
Perry, D.;
Sainz, R. D.

Publication type:

Article

Meta-analysis of factors affecting carcass characteristics of feedlot steers.

Published in:

Journal of Animal Science, 2006, v. 84, n. 11, p. 3143, doi. 10.2527/jas.2006-175

By:

Mcphee, M. J.;
Oltjen, J. W.;
Famula, T. R.;
Sainz, R. D.

Publication type:

Article

A meta-analysis study on the effect of maturity and implant status on carcass characteristics.

Published in:

Journal of Animal Science, 2006, v. 84, p. 13

By:

McPhee, M. J.;
Oltjen, J. W.;
Famula, T. R.;
Sainz, R. D.

Publication type:

Article

Effects of age on body condition and production parameters of multiparous beef cows.

Published in:

Journal of Animal Science, 2006, v. 84, n. 7, p. 1890, doi. 10.2527/jas.2005-733

By:

Renquist, B. J.;
Oltjen, J. W.;
Sainz, R. D.;
Calvert, C. C.

Publication type:

Article

Taurus: A Ration Formulation Program for Beef Cattle.

Published in:

Natural Sciences Education, 2013, v. 42, n. 1, p. 145, doi. 10.4195/nse.2011.00003

By:

Oltjen, J. W.;
Ahmadi, A.

Publication type:

Article

Wheat, Barley, Oat and Corn Silages for Growing Steers

Published in:

Journal of Animal Science, 1980, v. 51, n. 4, p. 958

By:

Bolsen, K. K.;
Oltjen, J. W.

Publication type:

Article

Beef Quality Assurance national rancher survey: program participation, best management practices, and motivations for joining future sustainability programs.

Published in:

Translational Animal Science, 2022, v. 6, n. 3, p. 1, doi. 10.1093/tas/txac094

By:

Klopatek, S C;
Cantwell, A M;
Roche, L;
Stackhouse-Lawson, K;
Oltjen, J W

Publication type:

Article

Evaluation of a feed intake model for the grazing beef steer

Published in:

Journal of Animal Science, 1991, v. 69, n. 2, p. 836, doi. 10.2527/1991.692836x

By:

Hyer, J. C.;
Oltjen, J. W.

Publication type:

Article

Development of a model to predict forage intake by grazing cattle

Published in:

Journal of Animal Science, 1991, v. 69, n. 2, p. 827

By:

Galyean, M. L.;
Hyer, J. C.;
Oltjen, J. W.

Publication type:

Article

Dry matter intake by feedlot beef steers: influence of initial weight, time on feed and season of year received in yard

Published in:

Journal of Animal Science, 1990, v. 68, n. 1, p. 254

By:

Owens, F. N.;
Hicks, R. B.;
Gill, D. R.;
Oltjen, J. W.;
Lake, R. P. Lake

Publication type:

Article

Daily dry matter intake by feedlot cattle: influence of breed and gender

Published in:

Journal of Animal Science, 1990, v. 68, n. 1, p. 245

By:

Owens, F. N.;
Hicks, R. B.;
Gill, D. R.;
Oltjen, J. W.;
Lake, R. P. Lake

Publication type:

Article

Relationships among weight change, body condition and reproductive performance of range beef cows

Published in:

Journal of Animal Science, 1988, v. 66, n. 12, p. 3153

By:

Wettemann, R. P.;
Selk, G. E.;
Lusby, K. S.;
Oltjen, J. W.;
Garmendia, J. C.;
Mobley, S. L.;
Rusby, S. J.

Publication type:

Article

Effects of body weight, frame size and rate of gain on the composition of gain of beef steers

Published in:

Journal of Animal Science, 1988, v. 66, n. 7, p. 1732

By:

Garrett, W. N.;
Oltjen, J. W.

Publication type:

Article

Carcass composition in mature Hereford cows: estimation and effect on daily metabolizable energy requirement during winter

Published in:

Journal of Animal Science, 1988, v. 66, n. 3, p. 603, doi. 10.2527/jas1988.663603x

By:

Wagner, J. J.;
Lusby, K. S.;
Oltjen, J. W.;
Rakestraw, J.;
Walters, L. E.;
Wettenman, R.P.

Publication type:

Article

Beef cattle feed intake and growth: empirical Bayes derivation of the Kalman filter applied to nonlinear dynamic model

Published in:

Journal of Animal Science, 1987, v. 65, n. 5, p. 1362

By:

Owens, F. N.;
Oltjen, J. W.

Publication type:

Article

Evaluation of a model of beef cattle growth and composition

Published in:

Journal of Animal Science, 1986, v. 62, n. 1, p. 98, doi. 10.2527/jas1986.62198x

By:

Oltjen, J. W.;
Baldwin, R. L.;
Bywater, A. C.

Publication type:

Article

Development of a dynamic model of beef cattle growth and composition

Published in:

Journal of Animal Science, 1986, v. 62, n. 1, p. 86

By:

Baldwin, R. L.;
Garrett, W. N.;
Oltjen, J. W.;
Bywater, A. C.

Publication type:

Article

Integration of energy and protein transactions in the body to build new tools for predicting performance and body composition of ruminants.

Published in:

Animal Production Science, 2019, v. 59, n. 11, p. 1970, doi. 10.1071/AN19229

By:

Oddy, V. H.;
Dougherty, H. C.;
Oltjen, J. W.

Publication type:

Article

Managing the herbage utilisation and intake by cattle grazing rangelands.

Published in:

Animal Production Science, 2015, v. 55, n. 3, p. 397, doi. 10.1071/AN14602

By:

Oltjen, J. W.;
Gunter, S. A.

Publication type:

Article