116 SILVICULTURE METHODS OF ARTIFICIAL REPRODUCTION 



State nurseries contributed free of charge 11,820,000 trees for 

 planting by the Civilian Conservation Corps. Of these trees more 

 than 2 million were planted on municipal forest areas, more than 8 

 million on State Forest lands, and a small number on private land. 

 In addition to this, state nurseries, chiefly in Indiana, Kentucky, Ohio, 

 Illinois, and Iowa, grew 40 million trees for erosion control planting, 

 including a very large number of black locust. 



2. CONDITIONS REQUIRING TREE PLANTING 



Reforestation generally means restocking or the reforesting of land 

 with forest trees. It is also known as tree planting, forest reproduc- 

 tion, or regeneration. 



FIG. 58. General aerial view of the Saratoga nursery in New York, one of the 



largest tree nurseries, which has a capacity of 50,000,000 or more trees or an 



annual output of 20,000,000 3-year old transplants. 



Artificial reproduction is accomplished by direct seeding, through 

 broadcasting or strip or hand sowing, as well as by planting with wild 

 or nursery-grown stock. Practically all reforestation is now being 

 done by nursery-grown stock and is therefore referred to as tree plant- 

 ing. The conditions which require tree planting are generally as 

 follows: 



1. Submarginal agricultural land which generally has been aban- 



