A Climate Index for Wheat Production in Australia


W Grace,1  P Schwerdtfeger2 and B Brooks3


1 Grace Research Network, Adelaide SA ,  2 Airborne Research Australia, Adelaide SA,  3 Bureau of Meteorology,  Adelaide SA.


Long-term growing-season rainfall and evaporation are compared on a spatial basis to current wheat growing in Australia. An index, M, is defined as M = R - ¼ E where R and E are the growing season rainfall and evaporation (in mm) at a point. Remarkably, the isopleth of M = 0  is found to follow the inland limit of wheat production over much of Australia.


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