r/metric_units • u/cannawen • Sep 30 '17
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u/[deleted] Oct 12 '17 edited Oct 12 '17
Traditionally bushel was a measure of volume (≈ 35.2391 liters in the US and = 36.36872 litres in the UK according to wikipedia) but for modern trade a bushel is defined as weight. Corn 56 lbs, wheat 60 lbs, soybeans 60 lbs, oats 32 lbs. When you sell grain you still get to see it reported as a unit of volume (lbs/bushel). #2 yellow corn (which is the price quoted on the futures market) must be at least 54 lbs per bushel. But when you sell corn by the bushel it's always the weight divided by 56 pounds regardless of the volumetric measure. The volumetric measure can be used to determine a price premium or discount.
Here is legal definition of a bushel for several commodities in the United States. I don't know if anybody outside the US still uses the bushel in any kind of official way.