Cedar Rapids Gazette: Water quality advocates on Thursday called on Tyson Foods to enact more conservation practices to help make Iowa’s impaired waterways cleaner. During a Des Moines news conference held in Water Works Park on the Raccoon River, the advocates expressed hope that the meat producer’s shareholders would approve a resolution urging the same at its shareholders meeting on Thursday in Arkansas. The shareholders’ resolution was rejected at Thursday’s meeting, according to a company spokeswoman who also defended Tyson’s record on water conservation practices.