A ]M E R I C A N SYLVICULTURE 



Laivson's Cypress: .Stands intense shade, resists frosts, 

 suffers from fungi; is well adapted to underplanting. 



Paragraph XXXVII. Results of planting experi- 

 ments with American hardwoods. 



For many years, the governmental forestry bureaus of the Ger- 

 man States have been examining the merits of some leading Ameri- 

 can tree species. 



Locust and White Pine have been planted so extensively that 

 they are considered as " naturalized forest citizens." 



In a number of instances, the European views fail to tally with 

 the results of American investigations made with reference to the 

 sylvics of our leading species. 



A. Fraxinns americana: Requirements as in excelsa; stands 

 inundation better. Germination in first spring. Plant seeds in fall, 

 or else in early spring after three days soaking. One year old, one 

 foot high. 



Use transplants two or three years old. 



Root is a tap-root with many side roots. 



Mayr does not advocate its propagation anywhere in Germany. 



B. Catalpa speciosa: Suffers from short summers, often freez- 

 ing down to ground. Hence frequently spreading growth. 



Seeds of high germinating percentage. 

 Use either seedlings or transplants two years old. 

 Light demanding, but fond of side shade. 



Mice peel at point of differentiation; all game is fond of 

 Catalpa, 



C. Juglans nigra: Mild, fresh soil required, and long warm 

 summers. 



When one year old, strong tap-roots over one foot long: root 

 fibres at end of tap-root tip. 



"Wlien two years old, the tap-root is over two and one-quarter 

 feet long. 



Height growth: 5 years old, 5 feet. 

 10 years old, 13 feet. 

 20 years old, 35 feet. 

 Decidedly light demanding; fond of side shade in early youth. 

 Yellow Pine shelter wood is very good: More shade prevents 

 lignification. in close stands, it is free from branches. 

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