• Erickson, Harvey D.
  College of Forestry, University of Washington, Seattle
  
• Lambert, Gregory M. G.
  College of Forestry, University of Washington, Seattle
  

Fertilization of forest stands is likely to be tried more and more in forest management in efforts to improve growth on the poorer sites. In evaluating the results of such treatments it is neccessary to know if they cause important changes in the chemical composition and the physical properties of wood. To assist in solving this problem an experiment was designed for studying the wood grown before and after fertilization and thinning on trees of a 30-year-old stands of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco).