** FILE ** In this 1996 file photo, Everet Hansen, a plant pathology professor from Oregon State University, looks over Port Orford cedars being developed for resistance to a killer root rot disease at the Dorena Tree Improvement Center outside Cottage Grove, Ore. After a decade of work, nurseries are ready to start selling ornamental varieties grafted onto disease-resistant root stock, and seedlings are being used to reforest burned areas on a national forest. (AP Photo/ Jeff Barnard)