The default share of alpha lost in six months, for a variety we have no figure
for.
0.38 is the mean of the twenty-eight varieties in Garetz's Table I, which
range from Galena and Perle at 15 % to Liberty at 55 %. Using the mean of published data instead of a round number
means anyone can re-derive it.
It's a poor substitute for the real figure and should be shown as an
estimate. For varieties at either end of the range it's badly off. A Galena
aged as if it were average loses more than twice the alpha it would in
practice, so the brewer should enter the number from the broker's sheet.
The default share of alpha lost in six months, for a variety we have no figure for.
0.38 is the mean of the twenty-eight varieties in Garetz's Table I, which range from Galena and Perle at 15 % to Liberty at 55 %. Using the mean of published data instead of a round number means anyone can re-derive it.
It's a poor substitute for the real figure and should be shown as an estimate. For varieties at either end of the range it's badly off. A Galena aged as if it were average loses more than twice the alpha it would in practice, so the brewer should enter the number from the broker's sheet.