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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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