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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 Modelling phosphorus metabolism.

In this chapter, examples of empirical, kinetic and mechanistic models of phosphorus (P) metabolism in ruminants and monogastric animals, viz. cattle, goats, sheep, horses, pigs and poultry, are discussed. The mechanistic models of P flow in ruminants and monogastric animals described in this...

Author(s)
Kebreab, E.; Vitti, D. M. S. S.; Odongo, N. E.; Dias, R. S.; Crompton, L. A.; France, J.
ISBN
2008 CABI (H ISBN 9781845933548)
Type
Book chapter
CABI Book Chapter Info
Cover for Modelling sugarcane utilization by dairy cows in the tropics.

Discussions on the use of sugarcane, either as a whole plant or in the form of sugar processing byproduct, as a source of forage for cattle in Brazil are presented. Focus is given on the influence of sugarcane feeding on dairy cattle performance.

Author(s)
Assis, A. G.; Campos, O. F.; Dijkstra, J.; Kebreab, E.; France, J.
ISBN
2008 CABI (H ISBN 9781845933548)
Type
Book chapter
CABI Book Info
Cover for Mathematical models in agriculture: quantitative methods for the plant, animal and ecological sciences.

This is a rewritten and expanded version of the 1984 book of the same title published by Butterworths. The objective remains the same: to teach advanced students of agriculture and related ecological sciences how to express ideas mathematically and solve the resulting mathematical problems....

Author(s)
Thornley, J. H. M.; France, J.
ISBN
2007 CABI (H ISBN 9780851990101)
Type
Book
CABI Book Chapter Info
Cover for Role of mathematical models.

Agriculture and science are put into context and 'explained'. Two simple mathematical models are presented in order to introduce modelling terminology and ideas, such as hierarchy and description. Hierarchy in biology is a concept crucial to understanding differences between various model types....

Author(s)
Thornley, J. H. M.; France, J.
ISBN
2007 CABI (H ISBN 9780851990101)
Type
Book chapter
CABI Book Chapter Info
Cover for Growth functions.

This chapter surveys a variety of growth equations, including commonly encountered ones such as the monomolecular, logistic, Gompertz and Richards, amongst others. These exhibit a range of shapes, encompassing diminishing returns and sigmoidal behaviour. Some of the equations can be derived from a...

Author(s)
Thornley, J. H. M.; France, J.
ISBN
2007 CABI (H ISBN 9780851990101)
Type
Book chapter
CABI Book Chapter Info
Cover for Simple dynamic growth models.

This chapter extends the previous chapter by presenting several models some of which are obtained by modification of the simplest growth functions, but are often not analytically soluble. First, ways in which simple exponential growth can be limited are considered. Then the representation of delays ...

Author(s)
Thornley, J. H. M.; France, J.
ISBN
2007 CABI (H ISBN 9780851990101)
Type
Book chapter
CABI Book Chapter Info
Cover for Dynamic deterministic models.

Dynamic deterministic models are the principal type of model used in this book, and, arguably, are the most important in the wider biological context. The general method of dynamic deterministic modelling is explained, emphasizing the role of state variables, differential equations, other...

Author(s)
Thornley, J. H. M.; France, J.
ISBN
2007 CABI (H ISBN 9780851990101)
Type
Book chapter
CABI Book Chapter Info
Cover for Simple ecological models.

Ecological models often use more 'holistic' concepts than those we have met so far. What this means is discussed. Differential equations and difference equations are considered. Models can be age-structured, morph-structured, or both. A Lotka-Volterra type of model is presented. A non-spatial...

Author(s)
Thornley, J. H. M.; France, J.
ISBN
2007 CABI (H ISBN 9780851990101)
Type
Book chapter
CABI Book Chapter Info
Cover for Environment and weather.

Time is discussed first, giving a number of essential but perhaps rather boring relationships between the continuous time variable, day of month, month and Julian day number. Astronomical equations of biological significance are then developed, covering the sun's elevation and azimuth angles, day...

Author(s)
Thornley, J. H. M.; France, J.
ISBN
2007 CABI (H ISBN 9780851990101)
Type
Book chapter
CABI Book Chapter Info
Cover for Plant and crop processes.

This paper discusses the principal processes needed for the development of plant and crop models. Its aim is to give an account of the themes which a crop modeller is likely to need, and at the same time give a critical appraisal of the state of the art. Careful evaluation of the assumptions of a...

Author(s)
Thornley, J. H. M.; France, J.
ISBN
2007 CABI (H ISBN 9780851990101)
Type
Book chapter

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