Weeds, diseases and insects are nature’s way of adding diversity to a system that lacks it. You can try to find technologies that can control all the problems that pop up, or you can prevent most of them by providing beneficial diversity of your own. Dwayne Beck explains why no-tillers will want to rediscover rotational techniques for managing pests, especially with current cost/price ratios. The director of the Dakota Lakes Research Farm near Pierre, S.D., shares why crop rotations that are consistent in sequence or interval provide opportunity for weeds and insects. He also discusses the strengths and weaknesses of different types of rotation.