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Pardey, Philip Dept. of Economics 1978 http://hdl.handle.net/2440/110375 en Soils -- Copper content -- Economic aspects -- South Australia; Soils -- Trace element content -- Economic aspects -- South Australia; Soils -- Zinc content -- Economic aspects -- South Australia The diffusion of trace element technology : an economic analysis Theses This electronic version is made publicly available by the University of Adelaide in accordance with its open access policy for student theses. Copyright in this thesis remains with the author. This thesis may incorporate third party material which has been used by the author pursuant to Fair Dealing exceptions. If you are the owner of any included third party copyright material you wish to be removed from this electronic version, please complete the take down form located at: http://www.adelaide.edu.au/legals Thesis (M.Ag.Sci.) -- University of Adelaide, Dept. of Economics, 1979open.access