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Timing Matters: How To Use Tillage More Effectively For Weed Management

Timing Matters: How To Use Tillage More Effectively For Weed Management
With herbicide resistance on the rise, there is a renewed emphasis on soil tillage as a critical component of integrated weed management. Research shows, though, that timing matters. When tillage occurs can significantly impact both weed density and the composition of the weed community that emerges from the weed seed bank.
 
In a study featured in the most recent edition of the journal Weed Science, researchers examined the impact of tillage on four sites in the northeastern U.S. that were tilled every two weeks during the growing season. Six weeks after each tillage cycle, researchers sampled random plots -- 196 in total -- to quantify the density and species of weed seedlings.
 
They found that total weed density tended to be greatest when soil was tilled early in the growing season. In fact, more than 50 percent fewer weeds emerged after late-season tillage than after early-season tillage.
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