Vegetated ditches show promise in cleaning tailwater


Issue Date: February 13, 2013
By Bob Johnson

If a grower runs irrigation tailwater the length of a 250-foot bare ditch to remove agricultural chemicals before the water leaves the farm, chlorpyrifos levels drop only 14 percent. But if that same ditch is lined with a plant like pennywort, it is possible to remove more than 72 percent of the chlorpyrifos.

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