CANBERRA (Dow Jones)--Production from a drought-affected wheat crop in Western Australia was revised sharply lower Friday to 3.93 million metric tons, down 28% from an estimate a month earlier of 5.49 million tons, the state's Grain Industry Association said Friday.

The new forecast would be less than half of the actual 8.25 million tons produced in the last crop year to March 31, 2010.