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Publication Information

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Title: Pine breeding in the United States

Author: Duffield, J. W.; Stockwell, Palmer;

Date: 1950

Source: In: Trees, the Yearbook of Agriculture 1949. United States Department of Agriculture: p. 147-153

Publication Series: Miscellaneous Publication

Description: Trees fit into the general rule that (the plants and animals which nature gave us have not been considered quite good enough. For millions of years, it is true, nature has developed a breathtaking variety of forms, each wonderfully adapted to its surroundings. Changes in climate or the conformation of the earth's surface have caused the extinction of some forms and the development and migration of others. But during the long development of civilization man has learned to alter some of the myriad forms of life about him, making them better suited to his needs.

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.



Duffield, J. W.; Stockwell, Palmer 1950. Pine breeding in the United States. In: Trees, the Yearbook of Agriculture 1949. United States Department of Agriculture: p. 147-153


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