Yield Difference

yield difference. (yee[e]ld' dif'-[e]-rehn[t]s)

    Difference in yield of extract in the laboratory and in the brewery for a given malt. Extract values are determined in a laboratory and are regarded as the greatest possible yield because the sample grist is very fine and the rest at saccharification temperature is long. Brewery grist is coarser and saccharification rests are shorter, so the extract yield of a malt in a brewery is less than it is in the lab. Modern breweries are able to realize a yield difference that is within 1 percent of the lab value. For example, if the lab extract value is 80 percent dry weight, the brewery should have a yield that is 79 percent or slightly higher.