FOREST PLANTING IN THE EASTERN UNITED STATES. 



35 



Douglas fir has been planted on poor stony soils in southern Michi- 

 gan and Ohio and on poor sandy soils in Rhode Island, and so far 

 has done very well. It is hardy and grows fairly rapidly. The 

 Rocky Mountain or northern Idaho variety should prove to be an 

 admirable tree for planting in the eastern region, but the Pacific 

 Coast variety may be damaged by frost. 



White spruce has lately come into favor in the Middle West as a 

 tree for windbreaks, and would probably do as well in the northeast. 

 It does not grow as rapidly as Norway spruce, but retains its lower 

 foliage better, and at the age of about 40 years, when Norway spruce 

 is likely to become ragged, is in its best condition for windbreak pur- 

 poses. For this purpose it should not be spaced more closely than 

 12 by 12 feet. On account of its tolerance, it is well adapted for 

 underplanting old deteriorating stands of cottonwood or maple. 



TABLE 10. Species and methods for planting in different regions. 

 TREELESS REGION. 



HARDWOOD REGION. 



NORTHEAST REGION. 



1 Yellow poplar should not be planted farther north than southern New York or southern New England. 



