36 forestry Quarterly. 



residue from old pits scattered through the forest was applied 

 \try heavily so as to form from one-third to one-half the bed. 

 These beds were sown with white pine broadcast and have stood 

 two years. This summer they were pronounced by both Dr. 

 Roth of Michigan and Mr. Dana of the Forest Service, excep- 

 tional in every respect. They supported seedlings fully as large 

 as average three year olds. There is some question as to whether 

 the charcoal acts purely in a physical manner or whether there 

 may be present a considerable wood ash content. This season 

 experiments in testing pure charcoal from the old furnace pile 

 will be carried on. 



These three years of experimental work have emphasized the 

 superior value of the physical fertilizer for these nurseries. It 

 is believed that the chemical fertilizer can best be applied in con- 

 nection with the green crop, that it will do more good in this 

 way than it will applied directly to the bed. It has been seen 

 that barnyard manure, if well rotted, has been of equal value 

 to any of the above. It is hoped that these results ma}'- be of 

 value to others working under similar site conditions. 



