Data/hora: 01/06/2024 02:27:17

Provedor de dados: 	31	
País: 	United States	
Título: 	Optimal management of annual ryegrass ( Lolium rigidum Gaud.) in phase rotations in the Western Australian Wheatbelt	
Autores: 	Doole,   Graeme J.	
Data: 	2011-12-02	
Ano: 	2008	
Palavras-chave: 	Annual ryegrass; Herbicide resistance; Multiple-phase optimal control; Crop Production/Industries.	
Resumo: 	Lucerne ( Medicago sativa L.) helps to prevent soil salinisation in the Western Australian Wheatbelt by reducing recharge to saline water tables. There is broad consensus, though, that it is not sufficiently profitable to motivate producers to plant it at the intensity at which considerable off-site benefits would be conferred. This paper employs a multiple-phase optimal control model to explore the value of this perennial pasture for the management of herbicide-resistant annual ryegrass ( Lolium rigidum Gaud.) in a crop–pasture rotation, given the difficulty of observing this value in practice. The availability of selective herbicides for efficient weed control is found to determine whether or not it is profitable to adopt lucerne pasture under optimal management. Herbicide resistance requires producers to employ costly, non-selective treatments for in-crop weed control. Thus, it motivates the adoption of perennial pasture in which cost-effective forms of control can be implemented. Moreover, this result is robust to feasible changes in the current economic environment.	
Tipo: 	Article	
Idioma: 	Inglês	
Identificador: 	http://purl.umn.edu/118547	
Relação: 	Australian Journal of Agricultural and Resource Economics&gt;Volume 52, Issue 3, September 2008	
Formato: 	24