SYLVICULTURE. 



Very slow growth to start with; one year one inch higli; two 

 years four inches high ; ten years eight ioches high. 



Plant seed-beds broadcast. Cover completely. Use transplants 

 four to five years old. Sensitive for too deep planting. 



Game are very bad ; wood mice peel the stump, or cut the roots. 



Less sensitive in late frost because late sprouting; more so in 

 winter frost. 



M. Juniperus virginiana : Avoid poor or wet soil.' 



Seeds lie over, always; .seedlings one to two years old are very 

 small and tender. Side shade always liked. Suffering from weeds 

 and grass. Red deer and Roe deer bite and beat it. 



Seeds kept in ditches over summer are planted in fall. 



Use yearlings and hole planting. 



N. Thuja plicata: Desires good, fresh soil. 



No swampiness! No dryness! 



Top shade or side shade is well liked; do not plant in open 

 ground. 



Deep root system. 



Height growth slow to begin with, rapid from seventh year on: 



Age 1 J'ear; height 1 inch. 



Age 5 years; lieight 4'^ feet. 



Age 10 years; height 8 feet. 



Age 15 years; height 15 feet. 



Age 20 years; height 23 feet. 



Slow cleaning of bole; very dense thickets required. 



Seed bearing from fifteenth year on. 



Sensitive for frosts and drought during first years. 



Game does not attack it; mice destroy young seedlings. 



Seeds are planted broadcast; slightly covered with dirt; sheltered 

 by lath screens. 



Strong seedlings three years old (not transplants) are used 

 since the root system is comparatively small, whilst the stem system 

 is comparatively large. 



O. Tsuga heterophylla: Requires strong soil; demands side 

 shade, but hates top shade. Cannot stand open situations. 

 ■^ Root is a strong tap-root. 



Height' growth good from third year on. 



Top-shoot-tips are frequently killed by first frost, without any 

 apparent permanent damage! 



Use seedlings three years old, raised by broadcast sowing. 



Shelter seed-beds well! Sensitive against deep planting. 



Mayr prefers heterophylla to canadensis for planting in Ger- 

 many. 



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