Variable geometry meter roller

An agricultural metering device, comprising:

• a meter roller, comprising:
• a first longitudinal end;
• a second longitudinal end;
• a longitudinal passage extending through the meter roller from the first longitudinal end to the second longitudinal end, wherein the longitudinal passage is configured to receive a drive shaft;
• and
• a plurality of flutes extending between the first and second longitudinal ends;
• wherein a cross sectional area of each flute in a plane generally parallel to the first and second longitudinal ends increases along a longitudinal axis of the meter roller.

An agricultural metering device, comprising:

• a meter roller configured to meter product from the agricultural metering device, the meter roller comprising:
• a first longitudinal end;
• a second longitudinal end;
• a plurality of ridges extending from the first longitudinal end to the second longitudinal end, wherein each pair of adjacent ridges of the plurality of ridges forms a respective flute, and each respective flute extends from the first longitudinal end to the second longitudinal end, and an aggregate cross sectional area of the respective flutes increases along a longitudinal axis of the meter roller from the first longitudinal end to the second longitudinal end.