Weeds are a major obstacle to successful crop production in organic farming. Producers may be able to reduce inputs for
weed management by designing rotations to disrupt population dynamics of weeds. Population-based management in
conventional farming has reduced herbicide use by 50% because weed density declines in cropland across time. In this
paper, we suggest a 9-year rotation comprised of perennial forages and annual crops that will disrupt weed population
growth and reduce weed density in organic systems. Lower weed density will also improve effectiveness of weed control
tactics used for an individual crop. The rotation includes 3-year intervals of no-till, which will improve both weed
population management and soil health. Even though this rotation has not been ?eld tested, it provides an example of
designing rotations to disrupt population dynamics of weeds. Also, producers may gain additional bene?ts of higher crop
yield and increased nitrogen supply with this rotation design.
