This may be an old trencher, but it still works for root pruning.

     Tree roots are always growing, so once in a while you have to prune them. The picture on the top has Jerry Stockmal and Nate Rix trenching a line between 10 fairway and the three Red Oaks to the right of the fairway.

     The picture on the bottom shows the results. All those thin roots that were severed no longer will draw valuable moisture and nutrients away from the fairway.