Weed competition can dramatically reduce soybean yields. The complexity of weed management is increasing with the combination of innovative herbicide-tolerant soybean systems and the development of herbicide resistance in problem weeds. Research-based best management practices help preserve existing weed control technology. Diversified weed-management plans use multiple herbicide sites of action and practices like cover crops and tillage to control weeds and steward herbicide technology. These checkoff-funded tools, resources and research projects support effective weed management to protect soybean yield.