US federal barrels
A Federal US Barrel is 31 gallons which is about 117.35 liters. This unit is normally used for apples, potatoes and other agricultural products.
US dry gallons
A US dry gallon is a unit of volume measurement normally used for dry goods such as grains, fruits, and vegetables. It is about 4.40488 liters or 0.16 cubic feet.
Note: The US dry gallon is different from the US liquid gallon, which is used for measuring liquids and is slightly smaller in volume.