Economic Contribution of French Serradella (Ornithopus Sativus Brot.) Pasture to Integrated Weed Management in Western Australian Mixed-Farming Systems: An Application of Compressed Annealing

20 Pages Posted: 27 Apr 2009

See all articles by Graeme J. Doole

Graeme J. Doole

The University of Western Australia - School of Agricultural and Environment

David J. Pannell

University of Western Australia

Clinton K. Revell

affiliation not provided to SSRN

Abstract

Sowing phases of French serradella (Ornithopus sativus Brot.) pasture between extended cropping sequences in the Western Australian wheatbelt can sustain grain production through restoring soil fertility and reducing selective herbicide use. The objective of this article is to investigate the profitability of rotations involving this pasture under a variety of weed management scenarios to obtain greater insight into its value for mixed farming systems in this region. A stochastic search procedure, compressed annealing, is used to identify profitable sets of weed management strategies in a simulation model representing a large number of potential combinations of chemical and non-chemical forms of weed control. In contrast to a continuous-cropping sequence, the inclusion of a serradella phase in a rotation is profitable at high weed densities and with increasing levels of herbicide resistance. A single year of pasture in the rotation is optimal if resistance to Group A selective herbicides is present at the beginning of the planning horizon, but a three-year phase is required if resistance to multiple herbicide groups is observed. Sowing a serradella pasture twice over a two-year phase is also shown to be economically attractive given benefits of successive high weed kills.

Suggested Citation

Doole, Graeme J. and Pannell, David J. and Revell, Clinton K., Economic Contribution of French Serradella (Ornithopus Sativus Brot.) Pasture to Integrated Weed Management in Western Australian Mixed-Farming Systems: An Application of Compressed Annealing. Australian Journal of Agricultural and Resource Economics, Vol. 53, No. 2, pp. 193-212, April 2009. Available at SSRN: https://ssrn.com/abstract=1375825 or http://dx.doi.org/10.1111/j.1467-8489.2007.00448.x

Graeme J. Doole (Contact Author)

The University of Western Australia - School of Agricultural and Environment ( email )

Nedlands, Western Australia 6907
Australia

David J. Pannell

University of Western Australia ( email )

35 Stirling Highway
Crawley, Western Australia 6009
AUSTRALIA
(08) 9844 8659 (Phone)
(08) 9844 8659 (Fax)

HOME PAGE: http://www.general.uwa.edu.au/u/dpannell/welcome.html

Clinton K. Revell

affiliation not provided to SSRN

No Address Available

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