Oregon State University
Forestry:    Forest Engineering, Resources, and Management | Forest Ecosystems and Society | Wood Science and Engineering
Vegetation Management Research Cooperative

Evaluating Common Regimes
This study was designed to statistically quantify the impact six herbaceous vegetation control regimes had on Douglas-fir seedling establishment, monitored changes to the vegetation community resulting from herbicide use, and intensively measured seedling xylem water potential and soil moisture conditions created through the use of these fall-spring management regimes. A single site located near Oakville, WA was established in the fall of 2005 and six treatment regimes, spanning a range of management intensities, were applied over a two year period. Soil moisture and xylem water potential were intensively measured across the 2006 and 2007 growing season. Seedling and vegetation community growth were measured each year for the first four years of establishment. Results from this study have been presented at State, National, and International professional meetings. Two publications have passed through the peer-review process and can be found in the Canadian Journal of Forest Research and New Zealand Journal of Forestry Science.

Effects of up to Five Years of Consecutive Weed Control and Delayed Weed Control on Douglas-fir and Other PNW Conifer Species

Twelfth-Year Response of Douglas-fir Seedlings to Area of Weed Control and Herbaceous versus Woody Weed Control