An agricultural metering system includes a meter roller having multipleflutes and recesses, in which the meter roller is configured to meter productfrom anagricultural product storage compartment to a product distribution system viarotationof the meter roller. The agricultural metering system also includes a shaftconfiguredto drive the meter roller to rotate, and a clutch assembly operatively coupledto themeter roller. The clutch assembly includes a magnetorheological (MR) fluid, arotation rate of the meter roller is at least partially dependent on aneffective viscosityof the MR fluid, and the effective viscosity of the MR fluid is controllablebased atleast in part on an effective magnitude of a magnetic field applied to the MRfluid.
