Hostname: page-component-7f64f4797f-zzvtc Total loading time: 0 Render date: 2025-11-04T14:54:46.745Z Has data issue: false hasContentIssue false
  • English
  • Français

The relation between animal gain and stocking rate in grazing trials: an examination of published theoretical models

Published online by Cambridge University Press:  27 March 2009

R. L. Sandland  and
R. J. Jones
R. L. Sandland
Affiliation:
C.S.I.R.O., Division of Mathematics and Statistics, Cunningham Laboratory, Mill Road, St Lucia, Queensland, Australia, 4067
R. J. Jones
Affiliation:
C.S.I.R.O., Division of Tropical Agronomy, Cunningham Laboratory, Mill Road, St Lucia, Queensland, Australia, 4067
Get access Rights & Permissions [Opens in a new window]

Summary

Jones & Sandland (1974) examined the validity of the linear model for gain per animal on stocking rate. This paper examines the alternative models of Conniffe, Browne & Walsh (1970, 1972) and a proposed extension of the model of Owen & Ridgman (1968). Discrepancies between these models and the linear model are studied in detail.

Under specified conditions these models are shown to be very close to the linear model. It is concluded, from the earlier work of Jones & Sandland (1974) and these results, that the empirically justified simple linear model has the advantage of being much easier to fit as well as embodying (approximately) the theoretical advantages of these conceptually superior models under a range of assumptions.

Information

Type
Research Article
Information
The Journal of Agricultural Science , Volume 85 , Issue 1 , August 1975 , pp. 123 - 128
Copyright
Copyright © Cambridge University Press 1975

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

REFERENCES

Blaxter, K. L. (1964). The efficiency of feed conversion by livestock. Journal of the Royal Agricultural Society of England 125, 87–99.Google Scholar
Cowlishaw, S. J. (1969). The carrying capacity of pastures. Journal of the British Grassland Society 24, 207–14.CrossRefGoogle Scholar
Conniffe, D., Browne, D. & Walshe, M. J. (1970). Experimental design for grazing trials. Journal of Agricultural Science, Cambridge 74, 339–42.CrossRefGoogle Scholar
Conniffe, D., Browne, D. & Walshe, M. J. (1972). An example of a method of statistical analysis of a grazing experiment. Journal of Agricultural Science, Cambridge 79, 165–7.CrossRefGoogle Scholar
Harlan, J. R. (1958). Generalized curves for gain per head and gain per acre in rates of grazing studies. Journal of Range Management 11, 140–7.CrossRefGoogle Scholar
Jones, R. J. & Sandland, R. L. (1974). The relation between animal gain and stocking rate in grazing trials: Derivation of a model from experimental results. Journal of Agricultural Science, Cambridge 83, 335–42.CrossRefGoogle Scholar
MOtt, G. O. (1960). Grazing pressure and the measurement of pasture production. Proceedings of the 8th International Grassland Congress. 606–11.Google Scholar
Owen, J. B. & Ridgman, W. J. (1968). The design and integration of experiments to study animal production from grazed pasture. Journal of Agricultural Science, Cambridge 71, 327–35.CrossRefGoogle Scholar
Peterson, R. G., Lucas, H. L. & Mott, G. O. (1965). Relationships between rate of stocking and per acre performance on pasture. Agronomy Journal 57, 27–30.CrossRefGoogle Scholar
Riewe, M. E. (1961). Use of the relationship of stocking rate to gain of cattle in an experimental design for grazing trials. Agronomy Journal 53, 309–13.CrossRefGoogle Scholar