Cargill Inc. said Monday it has resumed ground turkey production at an Arkansas plant that was the source of a major salmonella outbreak earlier this year. Wayzata-based Cargill said in a news release the U.S. Department of Agriculture allowed the resumption after approving an enhanced food safety plan. There are four ground turkey production lines at the plant. One has been reactivated. The other three will be turned on over the next few weeks, Cargill said.