the powered rolling and crimping device is used to terminate cover crops in a minimum tillage soil conservation system . the device includes a powered crimping mechanism in combination with a crop roller . power is transferred from a tractor power takeoff to a plurality of cam mechanisms via mechanical gearbox . the cam mechanisms raise and lower a crimping bar . as an operator directs a walk - behind tractor across a field of cover crops , a crop roller first flattens the crops and the powered crimping bar crimps the crops , thereby terminating the cover crops without severing the crop stalks disturbing the soil .