58 THE SEED TREE IMETHOD 



Eventually the seed tree method should find frequent and 

 successful use in forest regions where climate favors natural 

 reproduction. In regions where natural reproduction is seri- 

 ously handicapped by adverse climatic and site factors the 

 seed tree method with its scanty seed supply and exposure of 

 the site is out of place. Several of the southern pines, in- 

 cluding loblolly, shortleaf and slash pines, should be easily 

 reproduced by this method. Among the broadleaf trees, Cot- 

 tonwood, in some cases, can be managed by leaving seed 

 trees. 



Since the seed tree method can be applied with only one 

 cutting which removes nearly all the timber it may find use 

 where methods requiring more cuttings are too expensive. 



REFERENCES 



1. Willis, C. P., and Hofman, J. V. A Study of Douglas Fir Seed. Pro- 

 ceedings of the Society of American Foresters, Vol. X, 1915, pp. 141-164; and 

 KR.4EBEL, C. J. Choosing the Best Tree Seeds. Journal of Heredity (Organ 

 of the American Genetic Association), Vol. VIII, pp. 483-492. 



2. Pearson, G. A. The Influence of Age and Condition of the Tree upon 

 Seed Production in Western Yellow Pine. Circular 196, Forest Service, 

 United States Department of Agriculture, Washington, 191 2. 



3. Williamson, A. W. Cottonwood in the Mississippi Valley. Bulletin 

 24, United States Department of Agriculture, Washington, 1913, pp. 31-33. 



4. Kenety, W. H. Report of Cloquet Forest Experiment Station. Bulle- 

 tin 169, The University of Minnesota, St. Paul, 191 7, pp. 59-60. 



5. MuNGER, T. T. Western Yellow Pine in Oregon. Bulletin 418, United 

 States Department of Agriculture, Washington, 191 7, p. 15. 



6. Frothingham, E. H. White Pine under Forest Management, Bulletin 

 13, United States Department of Agriculture, Washington, 1914, p. 46. 



Howe, C. D. Address delivered before B. C. Forest Club. Proceedings of 

 the British Columbia Forest Club, Vol. 2, Victoria, 1916, pp. 83-87. 



Mattoon, W. R. Shortleaf Pine: Its Economic Importance and Forest 

 Management. Bulletin 308, U. S. Department of Agriculture, Washing- 

 ton, 1915, pp. 45-46. 



Recknagel, a. B. Some Aspects of European Forestry. Forestry Quarterly, 

 Vol. XI, 1913, p. 475. 



