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CAB eBooks

Ebooks on agriculture and the applied life sciences from CAB International

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CABI Book Chapter Info
Cover for Iterative development, evaluation and optimal parameter estimation of a dynamic simulation model: a case study.

Parameter estimation and model evaluation are crucial parts of the development of predictive simulation models. However, a lack of synchronization is often observed in the activities of modelling and experimentation in agriculture. One of the causes of the communication gap between modellers and...

Author(s)
Barioni, L. G.; Oltjen, J. W.; Sainz, R. D.
ISBN
2006 CABI Publishing (H ISBN 9781845930059)
Type
Book chapter; Conference paper
CABI Book Chapter Info
Cover for Representation of fat and protein gain at low levels of growth and improved prediction of variable maintenance requirement in a ruminant growth and composition model.

We have refined a prediction system for ruminant animal growth and composition developed previously. The model represents body protein in two pools: viscera and non-viscera (muscle). Using sheep data-sets, we have simplified the adjustments in the model for protein gain and loss of body fat at near ...

Author(s)
Oltjen, J. W.; Sainz, R. D.; Pleasants, A. B.; Soboleva, T. K.; Oddy, V. H.
ISBN
2006 CABI Publishing (H ISBN 9781845930059)
Type
Book chapter; Conference paper
CABI Book Chapter Info
Cover for Second-generation dynamic cattle growth and composition models.

Establishing effective strategies for future improvement of beef production requires integration of knowledge of genetics, nutrition and economics to optimize quality and quantity of beef produced. Failure to achieve an effective strategy negatively impacts on sustainability of both land and market ...

Author(s)
Oltjen, J. W.; Pleasants, A. B.; Soboleva, T. K.; Oddy, V. H.
ISBN
2000 CABI (H ISBN 9780851994499)
Type
Book chapter
CABI Book Chapter Info
Cover for Growth patterns of Nellore vs British beef cattle breeds assessed using a dynamic, mechanistic model of cattle growth and composition.

The dynamic model of post-weaning growth and composition developed by Oltjen et al. (1986) was reparameterized using a data-set of seven experiments with a total of 119 Nellore bulls where dry matter intake (DMI), metabolizable energy (ME) concentrations of the diets, and initial and final empty...

Author(s)
Sainz, R. D.; Barioni, L. G.; Paulino, P. V.; Valadares Filho, S. C.; Oltjen, J. W.
ISBN
2006 CABI Publishing (H ISBN 9781845930059)
Type
Book chapter; Conference paper