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The article presents a 2011 study by University of Massachusetts Turfgrass Research Center scientists on the potential of a manmade wetland in cleaning water used for washing equipment. Topics discussed include the wetland being composed of 2 beds that contain coarse gravel with reed canary grass and coarse sand with a combination of plants like woolgrass and soft rush, and the wetland being applied with fertilizer to assess levels of chemicals like nitrate, ammonium and phosphorous.