1. SMC Nutrition Report, Fall 09 Rob Harrison, nutrition head 1) General Progress 2) Carryover Study (Paul) 3) Paired-Tree (Kim) 4) N Fertilization/C Sequestration (Ben) 5) LTSP biomass (Carol) http://www.forestsoils.org/publications/SMC-2009Fall/

2. Nutrition TAC 1) Carryover Study -Paul Footen (M.S. student) found small but statistically significant differences in mean DBH and height after about the 5th year since planting, also understory differences -Paul completing understory/site characterization work, manuscript accepted for North American Forest Soils conference -Funding now primarily from TA/Gessel, sample analysis/travel paid from SMC

3. Article available at http://soilslab.cfr.washington.edu/publications/Footen-etal-2009.pdf

7. Soil Nitrogen

8. Nutrition TAC 2)Fall River/Matlock/Molalla LTSPs -Biomass equations -Funding new $40K 2008-2009 $555K total, initial new NCASI funding for 2009-2010 $30-40K, $585-595K total. -Brian Strahm (Ph.D.) now professor at Virginia Tech, wrote 2 pubs, SSSAJ and FEM pubs this year, North American Forest Soils Conf. -New Ph.D. student Carol Shilling, TA/Gessel support, nearing completion of 5-year aboveground biomass and some root work at Matlock and Molalla LTSPs.

9. Part of USFS LTSP

10. Available at: http://soilslab.cfr.washington.edu/publications/Strahm-etal-2009.pdf

12. Available at: http://soilslab.cfr.washington.edu/publications/Harrison-etal-2009.pdf

14. Figure 1. Matlock total N leaching from April 2005 to December 2008. Note the spike in total N leaching from July 2007 to March 2008 on the whole tree with no vegetation control (solid orange line) could have resulted from the eradication of large amounts of scotch broom that had invaded plots 12 and 20.

15. Figure 3. Scotch Broom at Matlock. No veg control. veg control.

16. Figure 2. Matlock N pools and fluxes from. Note the amount in total N flux on the whole tree with no vegetation control could have resulted from the eradication of large amounts of scotch broom that had invaded plots 12 and 20.

17. Effects of urea fertilization on carbon sequestration in Douglas-fir plantations of the Pacific Northwest Ben Shryock

18. Overall change C Site Understory (MgC/ha) Trees (MgC/ha) Soil (MgC/ha) Total (MgC/ha) Twin Peaks0.0261.86-35.6-33.7 Sandy Shore0.32430.5-25.75.06 Silver Creek0.354108105215 Roaring River0.016211-103108 Ostrander Road0.09860.8-31.829.1 Average 65 Mg/ha

19. Nutrition TAC 1)Future research needs - Paul Footen returning, tentatively LTSP - new student Joy Liu from Taiwan 2) Future collaborations 3) Additional funding sources??? -current $25K/y Agenda 2020 3 years -$40K/y NCASI (2008-9), $30K/y (2009-10) continuing -Approx $100K/y equiv. TA/Gessel fellowships