s with well-branched
fibrous root systems so that they will transplant easily. Research is
needed to determine practical methods of propagation which will permit
of inexpensive quantity production of superior named varieties of
shagbark and shagbark hybrid hickories.

Literature Cited

1. Barton, Lela V. Seedling production in _Carya ovata_, _Juglans
cinerea_, and _Juglans nigra_. Cont. Boyce Thompson Institute 8:1-5.
1936.

2. Becker, Gilbert. Notes from Southwestern Michigan. Rpt. North.
Nut Grow. Assoc. 28:135-136. 1937.

3. Benton, Wm. A. Report on propagation of nut trees. Rpt. North.
Nut Grow. Assoc. 29:90-92. 1938.

4. Brison, Fred R. The storage and seasoning of pecan budwood. Texas
Agric. Expt. Sta. Bul. 478. 1933.

5. ----. Personal correspondence. 1952.

6. Burkett, J. H. The pecan in Texas. Texas Dept. of Agric. Bul.
111. 1932.

7. Corsa, W. P. Nut culture in the United States. U. S. Dept. Agric.
Div. of Pomology. 1896.

8. Dunstan, R. T. Personal correspondence. 1952.

9. Gossard, A. C. Rooting pecan stem tissue by layering. Proc. Amer.
Soc. Hort. Sci. 38:213-214. 1941.

10. Last, Herman. Personal correspondence. 1952.

11. MacDaniels, L. H. Some experiences in nut tree grafting at
Ithaca, N. Y. Rpt. North. Nut Grow. Assoc. 28:52-55. 1937.

12. Morris, R. T. Top working hickories. Rpt. North. Nut Grow.
Assoc. 11:105. 1920.

13. ---- Nut growing. 1931. Macmillan, New York.

14. O'Rourke, F. L. Unpublished data. 1945.

15. Reed, C. A. Nut-tree propagation. U. S. Dept. Agric. For. Bul.
1501. 1926.

16. ----. Hickory species and stock studies at the Plant Industry
Station, Beltsville, Md. Rpt. North. Nut Grow. Assoc. 35:88-121.
1944.

17. Romberg, L. D. Use of nurse seedlings in propagating the pecan
from stem cuttings. Proc. Amer. Soc. Hort. Sci. 40:298-300. 1942.

18. Rosborough, J. F., F. R. Brison, C. L. Smith, and L. D. Romberg.
Propagation of pecans by budding and grafting. Texas Ext. Ser. Bul.
B-166. 1949.

19. Sitton, B. G. Pecan grafting methods and waxes. U. S. Dept.
Agric. Circ. 545. 1940.

20. Shelton, E. M. Glauber's salt for humidity control in scion
storage. Rpt. North. Nut Grow. Assoc. 28:70. 1937.

21. Smith, Gilbert L. Our experience with root stocks. Rpt. North.
Nut Grow. Assoc. 40:62-64. 1949.

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