Journal Articles


Shryock, B., Littke, K., Ciol, M., Briggs, D., and Harrison, R. 2014. The effects of urea fertilization on carbon sequestration in Douglas-fir plantations of the coastal Pacific Northwest. For. Ecol. Manage. 318: 341-348.

Mainwaring, Douglas B.; Maguire, Douglas A.; Perakis, Steven S. 2014. Three-year growth response of young Douglas-fir to nitrogen, calcium, phosphorus, and blended fertilizers in Oregon and Washington. Forest Ecology and Management (Impact Factor: 2.77). 01/2014; 327:178–188.

Eini C. Lowell, Douglas A. Maguire, David G. Briggs, Eric C. Turnblom, Keith J. S. Jayawickrama and Jed Bryce.  Effects of Silviculture and Genetics on Branch/Knot Attributes of Coastal Pacific Northwest Douglas-Fir and Implications for Wood Quality—A Synthesis.  Forests 2014, 5(7), 1717-1736; doi:10.3390/f5071717

Littke, K.M., Harrison, R.B., Zabowski, D., and Briggs, D.G. 2014. Assessing nitrogen fertilizer response of coastal Douglas-fir in the Pacific Northwest using a paired-tree experimental design. For. Ecol. Manage. 330: 137-143.

Littke, K.M., Harrison, R.B., Zabowski, D., Ciol, M.A., and Briggs, D.G. 2014. Prediction of Douglas-fir fertilizer response using biogeoclimatic properties in the coastal Pacific Northwest. Can. J. For. Res. 10.1139/cjfr-2014-0190.

Littke, K.M., Harrison, R.B., Zabowski, D., and Briggs, D.G. 2014. Effects of geoclimatic factors on soil water, nitrogen, and foliar properties of Douglas-Fir plantations in the Pacific Northwest. For. Sci.10.5849/forsci.13-141

 James, Jason, Warren Devine, Rob Harrison and Thomas Terry. 2014. Deep Soil Carbon: Quantification and Modeling in Subsurface Layers. Prepublished Soil Sci. Soc. Am. J. doi:10.2136/sssaj2013.06.0245nafsc.  Available at:

Jandl, R., M. Rodeghiero, C. Martinez, M.F. Cotrufo, F. Bampa, B van Wesemael, R.B. Harrison, I.A. Guerrini, D.D. Richter, L. Rustad, K. Lorenz, A. Chabbi and F. Miglietta. 2014. Current status, uncertainty and future needs in soil organic carbon monitoring. Science of the Total Environment 468:376-383. Available at:            

Knight, E, , P. Footen, R.B. Harrison, T. Terry, S. Holub. 2014. Competing vegetation effects on soil carbon and nitrogen 12 years post-harvest in a Douglas-fir plantation on a highly productive site. Prepublished Soil Sci. Soc. Am. J. doi:10.2136/sssaj2013.07.0320nafsc.          

Littke, Kim, R.B. Harrison, D. Zabowski, and D.G. Briggs. 2014a. Assessing Nitrogen Fertilizer Response of Coastal Douglas-fir in the Pacific Northwest using a Paired-tree Experimental Design. Forest Ecology and Management 330:137-143.       

Littke, K.M., Harrison, R.B., Zabowski, D.,  M.A. Ciol and D.G. Briggs. 2014b. Prediction of Douglas-fir Fertilizer Response Using Biogeoclimatic Properties in the Coastal Pacific Northwest. Canadian Journal of Forest Research. 
Available at:

Littke, K.M., Harrison, R.B., Zabowski, D., and Briggs, D.G. 2014c. Effects of geoclimatic factors on soil water, nitrogen, and foliar properties of Douglas-Fir plantations in the Pacific Northwest. Prepublished in Forest Science10.5849/forsci.13-141

Shryock, B., K. Littke, M. Ciol, D. Briggs and R.B. Harrison. 2014. The effects of urea fertilization on carbon sequestration in Douglas-fir plantations of the coastal Pacific Northwest. Forest Ecology and Management 318:341-348.
Available at:


Cross, J., E. Turnblom, J. Calhoun and G. Ettl.  (2013).  Biomass production on the Olympic and Kitsap peninsulas, Washington: Updated logging residue ratios, slash pile volume-to-weight ratios, and supply curves for selected delivery centroids.  USFS GTR PNW – 872.  30 p.  

Devine, WD, P.A. Footen, R.B. Harrison, T.A. Terry C.A. Harrington, S. M. Holub and P. J. Gould. 2013. Estimating Tree Biomass, Carbon, and Nitrogen in Two Vegetation Control Treatments in an 11-Year Old Douglas-Fir Plantation On a Highly Productive Site. USFS Research Paper PNW-RP-591, March 2013.   Available at:      

Himes, AJ, EC Turnblom, RB Harrison, KM Littke, WD Devine, D. Zabowski and DG Briggs. 2013. Predicting Risk of Long-Term Nitrogen Depletion under Whole-Tree Harvesting in the Coastal PacificNorthwest. Forest Science 60:382-390. Available at:              

Holub, SM, TA Terry, CA Harrington, RB Harrison and R Meade. 2013. Tree growth ten years after residual biomass removal, soil compaction, tillage, and competing vegetation control in a highly-productive Douglas-fir plantation. Forest Ecology and Management 305:60-66. Available at:               

James, J., Devine, W., Terry, T., Harrison, R. in press. Deep Soils: Accurately Quantifying and Modeling Carbon in Subsurface Layers. Soil Sci. Soc. Am. J. Proceedings of the 12th North American Forest Soils Conference. 10.2136/sssaj2013.06.0245nafsc

Lowell, E.C., Todoroki, C.L., Briggs, D.G., Dykstra, D.P. 2013. Examination of acoustic velocity along veneer value-chain in Douglas-fir trees. Ross, Robert J.; Wang, Xiping, eds. Proceedings: 18th International Nondestructive Testing and Evaluation of Wood Symposium. General Technical Report FPL-GTR-226. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. September 25-27, 2013. Madison, WI. pp. 125-133. (no hard copy printed)

Suntana, A.S., E.C. Turnblom, K.A. Vogt.  2013.  Addressing Unknown Variability in Seemingly Fixed National Forest Estimates: Aboveground Forest Biomass for Renewable Energy.  Energy Sources, Part A: Recovery, Utilization, and Environmental Effects 35(6): 546-555. 


Suntana, A., K. Vogt, E. Turnblom, D, Vogt and R. Upadhye. 2012. Non-Traditional Use of Biomass at Certified Forest Management Units: Forest Biomass for Energy Production and Carbon Emissions Reduction in Indonesia.  Int. J. Forestry Research. 2012: 1 – 12.

Devine, WD, P.A. Footen, B.D. Strahm, R.B. Harrison, T.A. Terry and T.B. Harrington. 2012. Nitrogen leaching following whole-tree and bole-only harvests on two contrasting Pacific Northwest sites. For. Ecol. Mgt. 267:7-17.  Available at:

Todoroki, C.L., Lowell, E.C., Dykstra, D.P. and Briggs, D.G. 2012. Maps and models of density and stiffness within individual Douglas-fir trees. New Zealand Journal of Forestry Sciences. 42:1-13.

Vaughn N.R., Moskal L.M., Turnblom E.C. 2012 Tree Species Detection Accuracies Using Discrete Point Lidar and Airborne Waveform Lidar. Remote Sensing  4(2):377-403. 


Vikram, Vikas, Marilyn L. Cherry, David Briggs, Daniel W. Cress, Robert Evans, and Glenn T. Howe (accepted 2010). Stiffness of Douglas-fir Lumber: Effects of Wood Properties and Genetics. Can. J. For. Res. 41 1160-1173 (2011).

Vaughn, N.R., E.C. Turnblom, M.W. Ritchie. 2010. Bootstrap evaluation of a young Douglas-fir height growth model for the Pacific Northwest. For. Sci. 56(6):592-601.

Harrison, R.B., P.W. Footen and B.D. Strahm. 2011. Deep soil horizons: Contribution and importance to soil C pools and in assessing whole-ecosystem response to management and global change. Forest Science 57(1):67-76.

Harrison, R.B., D.A. Maguire, and D. Page-Dumroese. 2011. Maintaining Adequate Nutrient Supply -- Principles, Decision Support Tools, and Best Management Practices. Page 33-42 in S.D. Angima and T.A. Terry Best Management Practices for Maintaining Soil productivity in the Douglas-fir Region. Oregon State University EM 9023. 

Briggs, D.G.  Wood quality: growing quantity vs quality value. Intensive Silviculture of Planted Douglas-fir Forests: in Proc. Opportunities for Increased Productivity. Sponsored by Center for Intensive Plantation Forestry and Western Forestry and Conservation Association, Feb 15, 2011, Portland, OR p77-117.

Vikram, Vikas, Marilyn L. Cherry, David Briggs, Daniel W. Cress, Robert Evans, and Glenn T. Howe 2011. Stiffness of Douglas-fir Lumber: Effects of Wood Properties and Genetics. Can. J. For. Res. 41:1160-1173.

Lippke, B., E. Oneil, R. Harrison, K. Skog, L. Gustavsson, and R. Sathre. 2011. Life cycle impacts of forest management and wood utilization on carbon mitigation: knowns and unknowns. Future Science: Carbon Management 2:303-333.

Littke, K.M., Harrison, R.B., Briggs, D.G., and Grider, A.R., Understanding soil nutrients and characteristics in the Pacific Northwest through parent material origin and soil nutrient regimes. Can. J. For. Res. Accepted.

Yadama,V.; Lowell, E.C.; and Langum, C. Characterization of wood strands from young, small-diameter trees. Wood and Fiber Science. Accepted.

Devine, WD; TB Harrington; TA Terry; RB Harrison; RA Slesak; DH Peter; CA Harrington; CJ Shilling; SH Schoenholtz. Five-year vegetation control effects on aboveground biomass and nitrogen content and allocation in Douglas-fir plantations on three contrasting sites. For. Ecol. Mgt. 262:2187-2198.  Available at: Can. J. For. Res. 40(1):72-85.


Briggs, D.G. 2010. Enhancing forest value productivity through fiber quality, J. of Forestry, 108(4):June 2010, 174-182.

Kantavichai, R. D. G. Briggs, E. C. Turnblom 2010.  Modeling effects of soil, climate, and silviculture on growth ring specific gravity of Douglas-fir on a drought-prone site in Western Washington. Forest Ecology & Management. 259(6):1085-1092.

Kantavichai, R. D. G. Briggs, E. C. Turnblom 2010. Effect of Thinning, Biosolids, and Weather on Annual Ring Specific Gravity and Carbon Accumulation of a 55 Year-old Douglas-fir Stand in Western Washington.Can. J. For. Res. 40(1):72-85.

Todoroki, C.L., E.C. Lowell, D.P. Dykstra. 2010. Automated knot detection on Douglas-fir veneer images.Computers in Engineering and Agriculture. 70(1): 163-171.

Langum, C.E., V. Yadama, and E.C. Lowell. 2010. Physical and Mechanical properties of young-growth Douglas-fir and western hemlock from western Washington. For. Prod. J. 59(11/112):37-47.Forest Products publications.

Gould, P.J.; Marshall, D.D. 2010. Incorporation of genetic gain into growth projections of Douglas-fir using ORGANON and the Forest Vegetation Simulator. Western J. of Applied Forestry 25(2):55-61.

Weiskittel, A.R., D.A. Maguire, R. Monserud, G.P. Johnson. 2010. A hybrid model for intensively managed Douglas-fir plantations in the Pacific Northwest, USA. Eur. J. For. Res. 129:325-338.

Briggs, D.G., R. Kantavichai, E. C. Turnblom. 2010. Predicting the Diameter of the Largest Breast-height Region Branch of Douglas-fir Trees in Thinned and Fertilized Plantations. For. Prod. J. 60(4):322-330. Forest Products publications.

Vaughn, N.R., E.C. Turnblom, M.W. Ritchie. 2010. Bootstrap evaluation of a young Douglas-fir height growth model for the Pacific Northwest. For. Sci. 56(6): 592-602. Forest Products publications.

T. Z. Ye, K. J. S. Jayawickrama and J. B. St. Clair (2010): Realized Gains from Block-Plot Coastal Douglas-Fir Trials in the Northern Oregon Cascades. US Forest Service PNWRS Publications Information.


Briggs, D. 2009. Research Cooperatives Serve the Forestry Community. Western Forester. 54(4):1-4 pp.

Briggs, D. 2009. PFC Brings High Tech Tools to Forestry Sector. Western Forester. 54(4):10 pp.

Footen, P. W., Harrison, R. B., and B.D. Strahm., 2009. The long-term effects of nitrogen fertilization on understory vegetation in Douglas-fir plantations in the Pacific Northwest. Forest Ecol. Manage. Volume 258, Issue 10, 30 October 2009, 2194-2198 pp.

Strahm B. D., Harrison, R. B., Terry, T. A., Harrington, T. B., Adams, A. B., Footen, P. W., 2009. Changes in dissolved organic matter with depth suggest the potential for postharvest organic matter retention to increase subsurface soil carbon pools. Forest Ecol. Manage. Volume 258, Issue 10, 30 October 2009,  2347-2352 pp.

Flint, C.M., R.B. Harrison, B.D. Strahm, A.B. Adams. Nitrogen leaching from Douglas-fir forests following urea fertilization and impacts on water quality. Journal of Environmental Quality


Briggs, D.G. R. Kantavichai, E.C. Turnblom. 2008 Effect of precommercial thinning followed by a fertilization regime on branch diameter in coastal Douglas-fir plantations. Can. J. For. Res. 38:( 6): 1564-1575 pp.

Sucre, E.B., R.B. Harrison, E.C. Turnblom, D.G. Briggs. The use of various soil and site variables for estimating growth response of Douglas-fir to multiple applications of urea and determining potential long-term effects on soil properties. Can. J. For. Res. 38:1458-1469 pp.

Briggs, D.G., G. Thienel, E.C. Turnblom, E. Lowell, D. Dykstra, R.J. Ross, X. Wang, and P. Carter. 2008. Influence of thinning on acoustic velocity of Douglas-fir trees in Western Washington and Western Oregon. In: Proc. of the 15th International Symposium on Nondestructive Testing of Wood, Sept. 10-12, Duluth, MN. Forest Products Society, Madison, WI. pp. 113-123 pp.


Briggs, D.G., L. Ingaramo, E.C. Turnblom. 2007. Number and Diameter of Breast-height Region Branches in a Douglas-fir Spacing Trial and Linkage to Log Quality. Forest Products Journal. 57(9):28-34 pp.

Li, Y., E.C. Turnblom, D.G. Briggs. 2007. Effects of Density Control and Fertilization on Growth and Yield of Young Douglas-fir Plantations in the Pacific Northwest. Can. J. For. Res. 37:(2): 449-461 pp.

Pittman, S. D., B. B. Bare, D. G. Briggs. 2007. Hierarchical Production Planning in Forestry Using Price-Directed Decomposition. Can. J. For. Res. 37:2010-2021 pp.

Remington, S.M., B.D. Strahm, V. Neu, J.E. Richey, and H. Brandão da Cunha. 2007. The Role of Sorption in Control of Riverine Dissolved Organic Carbon Concentrations by Riparian Zone Soils in the Amazon Basin. Soil Sci. 172:279-291, 43 pp.

Strahm, B.D., and R.B. Harrison. 2007. Mineral and organic matter controls on the sorption of macronutrient anions in variable-charge soils. Soil Science Society of America Journal. 71(6): 1926-1933 pp.


Amoroso, M.M. and E.C. Turnblom. 2006. Comparing productivity of pure and mixed Douglas-fir and western hemlock plantations in the Pacific Northwest. Can. J. For. Res. 36(6):1484-1496 pp.

Strahm, B.D., and R.B. Harrison. 2006. Nitrate Sorption in a Variable-Charge Forest Soil of the Pacific Northwest. Soil Science. 171:313-321 pp.

Vance, E.D., T.A. Terry, R.B. Harrison, C.A. Harrington, B.D. Strahm, and A. Ares. 2006. The Fall River Long-term Soil Productivity Study: Linking Processes to Operations in Pacific Northwest Douglas-fir. Western Forester. 51:12-15 pp.

Weiskettel, A., D. Maguire, R.A. Monserud, R. Rose, E. Turnblom. 2006. of Intensive management influence on Douglas-fir stem form, branch characteristics, and simulated product recovery. N. Z. J. For. Sci. 36(2-3): 293-312 pp.


Adams, A.B., R.B. Harrison, R.S. Sletten, B.D. Strahm, E.C. Turnblom, and C.M. Jensen. 2005. Nitrogen-fertilization impacts on Carbon Sequestration and Flux in Managed Coastal Douglas-fir Stands of the Pacific Northwest. For. Ecol. Manage. 220: 313-325 pp.

Briggs, D. 2005. The Stand Management Cooperative: A Source of Information for Cost-effective Reforestation. Western Forester 50(3):1-3 pp.

Briggs, D.G., E.C. Turnblom, B.B. Bare. 2005. Non-destructive Methods and Process Capability Analysis to Assess Conformance of Douglas-fir Stands to Customer Quality Specifications. New Zealand Journal of Forestry Science 35(2/3):170-188 pp.

Marshall, D.D. and E.C. Turnblom. 2005. Wood Productivity of Pacific Northwest Douglas-fir: Estimates from Growth and Yield Models. J. For. 103(2): 71-72 pp.

Strahm, B.D., R.B. Harrison, B.L. Flaming, T.A. Terry, C.W. Licata, and K.S. Petersen. 2005. Soil Solution Nitrogen Concentrations and Leaching Rates as Influenced by Organic Matter Retention on a Highly Productive Douglas-fir Site. For. Ecol. Manage. 218: 74-88 pp.

Turnblom, E. Y. Li, D. Briggs 2005. Fertilization and Commercial Thinning Effects on Growth and Yield of Douglas-fir Plantations. Western Forester 50(3):4-6 pp.

Turnblom, E.C. 2005. Planting Density: A Consideration in Cost-effective Reforestation. Western Forester 50(3): 12-13.


Prietzel, J, Wagoner G.L., Harrison R.B. 2004. Long-term Effects of Repeated Urea Fertilization in Douglas-fir Stands on Forest Floor Nitrogen Pools and Nitrogen Mineralization. Forest Ecology & Management 193:413-426 pp.

Sonne, E., E. Turnblom, D. Briggs, G. Becker 2004. Log and Lumber Quality and Value from a Low Site, 55 Year Old Douglas-fir Stand in Western Washington 20 Years after Thinning and Biosolids Fertilization. Western Journal of Applied Forestry 19(1):1-8 pp.


Harrison, R.B., A.B. Adams, C. Licata, B. Flaming, G.L. Wagoner, P. Carpenter and E.D. Vance. 2003. Quantifying Deep-soil and Coarse-soil Fractions: Avoiding Sampling Bias. Soil Sci. Soc. Am. J. 67(5):1602-1606 pp.

Pittman, S.D. and E.C. Turnblom. 2003. A Study of Self-thinning using Coupled Allometric Equations: Implications for Coastal Douglas-fir Stand Dynamics. Can. J. For. Res. 33:1661 1669 pp.

Turnblom, E.C. and R.L. Collier. 2003. Growth of Residual Branches on Pruned Coastal Douglas-Fir. Western Journal of Applied Forestry 18(3):185 188 pp.


Harrison, R.B., E.C. Turnblom, C.L. Henry, P. Leonard, R. King, R. Gonyea. 2002. Response of three young Douglas-fir plantations to forest fertilization with low rates of municipal biosolids. Journal of Sustainable Forestry 14(2/3): 21-30 pp.


Collier R.L., E.C. Turnblom. 2001. Epicormic branching on pruned coastal douglas-fir. Western Journal of Applied Forestry. 16(2):80-86 pp.

Harrison, R.B., M.G.F. Reis, G.G. Reis, D.J. Firme and A.L. Bernardo. 2001. Effect of spacing on N and P distribution in Eucalyptus Camaldulensis, E. pellita and E. urophylla in Southeastern Brazil. Forest Ecology and Management 133:167-177 pp.

Skinner, M.F., D. Zabowski, R.B. Harrison, A. Lowe and D. Xue. 2001. Measuring the cation exchange capacity of forest soils. Communications in Soil Science and Plant Analysis: 32:1751-1764 pp.


Canary, J.D., R.B. Harrison, J.E. Compton, H.N. Chappell. 2000. Additional carbon sequestration following repeated urea fertilization of second-growth Douglas-fir stands in Western Washington. Forest Ecology & Management 138:225-232 pp.

Collier, R.L., E.C. Turnblom. 2000. Response of coastal Douglas-fir to live crown removal: epicormic branching. Western Journal of Applied Forestry 16 (2): 80-86 pp.

Harrison, R.B., J. Krejsl, N.S. Turner, J.A. Hoyle and C.L. Henry. 2000. Treatment of Septic Effluent for Fecal Coliform and Nitrogen in Coarse-textured Soils: Use of Soil-only and Sand Filter Systems . Water, Air and Soil Pollution 124:205- 215.

Henry, C.L., M.Van Ham, M. Grey, N. Cowley and R.B. Harrison. 2000. Field method for N mineralization using porous ceramic cups. Water, Air and Soil Pollution 117:123-131.

Rosenfeld, P.E., C.L. Henry, R.L. Dills and R.B. Harrison. 2000. Comparison of odor emissions from three different biosolids applied to forest soil. Water, Air and Soil Pollution 127:173-191 pp.

Verberg, P.S.J., D.W. Johnson and R.B. Harrison. 2000. Long-term nutrient cycling patterns in Douglas-fir and red alder: A simulation study. Forest Ecology and Management 145:203-217 pp.


Turnblom, E.C. 1999. Pruning and spacing affect branch size and stem form in Douglas-fir. Western Forester 44(3):12 pp.


Hanus, M.L., D.W. Hann, and D.D. Marshall. 1998. Reconstructing the spatial pattern of trees from routine stand examination measurements. Forest Science 44(1):125-133 pp.

Kimball, B.A., E.C. Turnblom, D.L. Nolte, D.L. Griffin, R.M. Engeman. 1998. Silvicultural effects on selected cambialzone vascular tissue chemicals: Relationships with black bear conifer foraging. Forest Science 44:599-602 pp.


Curtis, R.O., D.D. Marshall, and J.F. Bell. 1997. LOGS a pioneering example of silvicultural research in coast Douglas-fir. Journal of Forestry 95(7):19-25 pp.

Dubrasich, M.E., D.W. Hann, and J.C. Tappeiner III. 1997. Methods for evaluating crown area profiles of forest stands. Canadian Journal of Forestry Research 27:385-392 pp.

Marshall, D.D., D.L. Johnson, and D.W. Hann. 1997. A forest management information system for education, research, and operations. Journal of Forestry 95(10):27-30 pp.

Petruncio, M., D. Briggs and R.J. Barbour. 1997. Predicting pruned branch stub occlusion in young, coastal Douglasfir. Canadian Journal of Forestry Research 27: 1074-1082 pp.

Tappeiner III, J.C., D. Huffman, D.D. Marshall, T.A. Spies and J.D. Bailey. 1997. Density, ages, and growth rates in old growth and young-growth forest in coastal Oregon. Canadian Journal of Forestry Research 27:638-648 pp.


Brallier, S., R.B. Harrison and C.L. Henry. 1996. Liming effects on availability of Cd, Cu, Ni and Zn in a soil amended with sewage sludge 16 years previously. Water, Air and Soil Pollution 86:195-206.

Briggs, D.G. 1996. Modeling crown development and wood quality. Journal of Forestry 94(12):24-25 pp.

Harrison, R.B., S.P. Gessel, D. Zabowski, C.L. Henry, D. Xue, D.W. Cole and J.E. Compton. 1996. Mechanisms of negative impacts of three forest treatments on nutrient availability. Soil Sci. Soc. Am. J. 60:1622-1628 pp.

Harrison , R.B., Bernardo, A.L., M.G.F. Reis, G.G. Reis. 1996. Effect of spacing levels on growth and nutrient distribution of Eucalyptus camaldulensis, E. pellita and E. urophylla in southeastern Brazil. Agronomy Abstracts 87 pp.

Reis, G.G., M.G.F. Reis, R.T. Gomes and R.B. Harrison. 1996. Effect of spacing on water relations of Eucalyptus camaldulensis, E. pellita and E. urophylla in southeastern Brazil. Agronomy Abstracts 87.

Reis, M.G.F., G.G. Reis, A.L. Bernardo and R.B. Harrison. 1996. Effect of spacing regimes on lateral and vertical root growth of Eucalyptus camaldulensis and E. pellita in southeastern Brazil. Agronomy Abstracts 87 pp.

Turnblom, E.C. and T.E. Burk. 1996. Adjusting volume table estimates using normal form quotient. Canadian Journal of Forestry Research 26:155-158 pp.