114 SILVICULTURE METHODS OF ARTIFICIAL REPRODUCTION 



erally proved to be unsuccessful especially in our National Forests. 

 The first real accomplishment was the planting of 9731 acres in the 

 National Forests in 1914 at a cost of about $10 per acre. 



Since the World War, many states have established forest tree 

 nurseries, and the planting program of the Forest Service has been 

 accelerated by the installation of additional nurseries and active at- 

 tempts to plant areas within the National Forest, especially in the 

 Lake States. The Clarke-McNary Act of 1924 encouraged additional 

 tree planting by the states from the subsidies granted by the govern- 

 ment for the establishment of nurseries and the distribution of small 



FIG. 55. Planting crew at work in the Ottawa National Forest in Michigan 



trees. In a recent year, over 69,000 acres were planted in the National 

 Forests; this represented the planting of approximately 70 million 

 trees. The achievement was due largely to the availability of large 

 numbers of men from the Civilian Conservation Corps and other gov- 

 ernment allotments of funds. Ten nurseries are maintained by the 

 U. S. Forest Service, and three new ones have been established at 

 Manistee and Manistique, Michigan, having capacities of 25 millions 

 and 18 millions of trees, respectively. One near Alexandria, Louis- 

 iana, has an annual production of 10 million trees. The Forest 

 Service nurseries have an estimated annual production of 100 million 

 trees, which will plant approximately 100,000 acres. There are about 

 2 million acres in need of planting in the National Forests. Planting 



