452 



APPENDIX. 



pounds per acre, containing, according to kind and condition 

 of growth and soil, from 24 to 220 pounds of minerals, potash, 

 phosphoric acid, magnesia, lime, etc., and 12 to 60 pounds of 

 nitrogen, the whole equivalent to not less than 20 to 30 

 cents or more of fertilizer. 



This accounts for the well-known fertility of fresh forest 

 soils, which have accumulated these minerals in the surface 

 layers. 



A large literature on the subject of forest litter has been 

 occasioned in Germany, owing to the conflicting interests of 

 foresters and small farmers who desire to, and by necessity 

 do, assist their scant crops by this forest manure, to the detri- 

 ment of the forest crop. 



P. 134. Results of Forest Management in Saxony, and 

 other state forest administrations. — The most intensive 

 management is possible in this densely populated and highly 

 industrial portion of Germany. The periodic changes 

 from 1817, when a systematic forest management had only 

 been begun, through the century are exhibited in the fol- 

 lowing tabulation, giving results per acre on about 430,000 

 acres. 



