Periodical Literature. 269 



Quality. Depth. Geometric mean. 



Site II 28"— 120" 85" 



in 35"- 85" 55" 



IV 25" — 60" 40" 



V 25"- 65" 35" 



Stunted 5" — 40" 20" 



The problem of improving forest soils cannot be solved by fer- 

 tilization. That is too expensive. Much can, however, be done 

 by cheaper methods of cultivation prior to reproduction ; provid- 

 ing there is a proper mixture of deep and shallow rooted species, 

 so as to completely utilize the soil and prevent its deterioration 

 through weed growth, excessive light, and loss of humus. In 

 the application of such methods the three main objects to be at- 

 tained are drainage, complete aeration and the maximum humus 

 content. 



The following table shows the comparative cost of different 

 methods of cultivation prior to securing natural regeneration or 

 planting : 



Ridge cultivation, (especially applicable to swampy 



soils and sandy soils with a high water table, $20 an acre 



Deep plowing (over 12 inches), $8-10 an acre 



Shallow plowing, $4 an acre 



Dynamiting, $16 an acre 



K. W. W. 



Beitrdge zur Physiologic dcs Badens. Forstwissenscliaftliches Central- 

 blatt, January, 1914, pp. 26-44. 



It is a common practice of the profession 



Soil in Germany to have excursions which visit 



Preparation points of interest and take up, under the 



for guidance of the responsible officials the 



Natural problems of management which the forest 



Regeneration. visited presents. While it will be several 



generations before we can show the results 



of long time management, the excursion idea is a good one. It 



profits both the visitor and the visited. 



The most interesting points about the Langenbrand Forest in 



