(Lebanon, OR)  --  Linn County authorities say a woman died following a tractor crash.  Deputies say 47-year-old Doris Eileen Jennings and her husband were working yesterday afternoon to remove a tree on private property in Lebanon.  The tractor, which was chained to the tree, flipped over on top of Jennings when she applied more throttle to the engine.  She was pronounced dead at the scene.