Text Size:   A+ A- A   •   Text Only
Site Image
Oregon's Forest Atlas 2010 online edition
Oregon Forestland Site Productivity
Return to Forest Atlas main page 
Forestland site productivity -- the inherent capacity of the land to grow wood -- is affected by factors such as geology, soil health, precipitation, sun exposure and elevation. Forestland in western Oregon is some of the most productive in the world, compared to other temperate and boreal forest regions. Site productivity in eastern Oregon tends to be significantly lower, primarily due to lower precipitation. The site productivity of forest soils in the Blue Mountains of northeast Oregon is also influenced by deep ash deposits resulting from the eruption (estimated to have occurred around 5,677 B.C. give or take 150 years) of Mount Mazama, the same eruption that created Crater Lake.

Map for download and viewing
Oregon forest site productivity map
This map identifies potential cubic foot growth of wood per acre, per year in various regions of Oregon.
Data Source: Greg Latta, Oregon State University Department of Forest Engineering (2009)
JPG version of the map - ( 2.25 Mb file)
Data description for this map 

This map is not intended for use in determining site productivity of specific forest parcels or at other fine scales. Consult Oregon Department of Forestry Land Use Planning Technical Note #3 for technical guidance on fine-scale forest site productivity determinations.

Detail zoom-in of northwestern Oregon
Detail area of zoom map - northwestern Oregon
A 'map zoom' provides additional detail of land cover data for the northwest Oregon area.

Map of the zoom area
JPG version of the map - (1.2 Mb file)

Detail zoom-in of the Three Sisters region of central Oregon
Detail area of zoom map - Three Sisters region of central Oregon
A 'map zoom' provides additional detail of land cover data for the area surrounding the Three Sisters area of the Cascade Mountain range.

Map of the zoom area
JPG version of the map - (1.8 Mb file)

Important information about Forest Atlas map products
Data for the Forest Atlas was compiled by staff with the Oregon Department of Forestry in 2010 using data generated by the U.S. Forest Service PNW Research Station in Corvallis, Oregon State University and the Oregon Department of Forestry.
This product is for informational purposes, and may not be suitable for legal, engineering or surveying purposes. This information or data is provided with the understanding that conclusions drawn from such information are the responsibility of the user.

Data contained within the map products does not necessarily reflect conditions at a fine-detail level.  Some data models rely on site information at least one year old. All information published herein is gathered from sources which are thought to be reliable, but the reader should not assume that the information is official or final, especially for the purposes of land use determination. The Oregon Department of Forestry does not assume responsibility for errors, and all research information contained within the website is subject to change without notice.
Additional information is contained in the liability notice 
Oregon's Forest Atlas main page 
2010 Forest Assessment and Resource Strategy project information 
Additional questions about the Forest Atlas can be addressed to the ODF Agency Affairs Office.