The cover crops roller/crimper (R/C) is a ground-driven tractor attachment that can be mounted on the front or rear of the tractor. You can push or pull the R/C at cover crop flowering to roll down fall-seeded cover crops such as rye. This creates a bio-suppressive cover crop mat up to five inches thick. This mat then shades out weeds, preventing germination and thus reducing weed populations. The system is a noninvasive form of no-till weed control. Our research has shown this practice to curb the proliferation of weeds in the field. Crops such as corn and soybeans are then planted with no-till equipment into this mat (mulch) of suppressive cover crops, and no herbicides are needed for season-long weed control.