Courtesy of Oregon State University A new survey finds a growing number of Douglas fir trees in the Oregon Coast Range have been infected over the past decade with the fungal disease known as Swiss ...

Four years ago, my wife and I, with occasional help from our grown son and a couple friends, planted 700 trees at our place outside Creswell. With buckets, shovels and endless optimism, we stuck one ...

A new study finds the West is likely to see slower-growing Douglas fir trees in the future, as temperatures and droughts increase with climate change. Researchers with the University of ...

Add Yahoo as a preferred source to see more of our stories on Google. Drought and insects have killed an unprecedented number of Oregon’s Douglas fir trees during the last decade, costing billions in ...

Douglas-fir (Pseudotsuga menziesii Mirb. Franco) seedlings were grown in a series of 7 sub-irrigated sand culture experiments in which N was supplied from either a nitrate or an ammonium source. The ...