Round bales of hay or straw can be used to mulch between rows of plastic film mulch used in vegetable production. This practice may be particularly useful for organic production where herbicide use is prohibited. To make the job of unrolling round bales between rows of plastic easier, a commercially available three-point hitch mounted bale unroller was modified by extending the toolbar and adding a second mast so that the bale is offset, allowing the tractor to straddle a row of plastic while unrolling the bale between the rows.