I have a side-hill pasture that had extensive terracing work done last fall. Retaining walls built from boulders and ditches that have subdued the snow-melt runoff--it's terrific. Mulch hay was spread last fall & this spring it will need to be harrowed. But this ain't your garden. Rocks, tree roots (stumps are gone), churned up blackberry canes. Part of the plan is to expose all the junk so it can be picked up. I need advice on what best sort of attachment to use. My 'tractor' by the way, is a smallish ATV. Thanks...