Page:  of 736
 
erate satisfactorily; others are replaced -- or might better be replaced -- with
different sets of materials. Whether the replacement is to be with the
same biotypes, with somewhat different biotypes of the original species,
or with entirely different species, depends on a considerable array of
factors. These factors are within the province of scientific silviculture,
but they cannot be ascertained without a great deal of painstaking research.Biotypic variation is the fundamental mechanism leading to the evolu-
tion of the manifold kinds of organisms with which this world abounds,
and an understanding of it is indispensable in any consideration of the
proper utilization and regeneration of our forests, our most important
replaceable natural resource.
SELECTED REFERENCES
AXELROD D. I. 1952. "A theory of angiosperm evolution," Evolution, 6:29-60.
BLUMENSTOCK D. I., and THORNTHWAITE C. W. 1941. Climate and the world pattern. ( In
Climate and man: yearbook of agriculture, pp. 98-127. U.S. Dept. of Agriculture, Wash-
ington.)
BRAUN E. L. 1950. Deciduous forests of eastern North America. Blakiston Co., Philadelphia.
CAMP W. H. 1947. "Distribution patterns in modern plants and the problems of ancient
dispersals," Ecol. Monogr., 17:159-183.
------. 1951. "Phytophyletic patterns on lands bordering the South Atlantic Basin," Bull.
Amer. Mus. Nat. Hist., 99:205-212.
------ and GILLY C. L. 1943. "The structure and origin of species," Brittonia, 4:323-385.
LI HUI-LIN. 1953. "Present distribution and habitats of the conifers and taxads," Evolution,
7:245-261.
RICHARDS P. W. 1952. The tropical rain forest. Cambridge University Press, London.
ROSSBY C. G. 1941. The scientific basis of modern meteorology. ( In Climate and man: year-
book of agriculture, pp. 559-655. U.S. Dept. of Agriculture, Washington.)
RUSSELL R. J. 1941. Climatic changes through the ages. ( In Climate and man: yearbook of
agriculture, pp. 67-97. U.S. Dept. of Agriculture, Washington.)

-47-

Questia, a part of Gale, Cengage Learning. www.questia.com

Publication Information: Book Title: A World Geography of Forest Resources. Contributors: Stephen Haden-Guest - editor, John K. Wright - editor, Eileen M. Teclaff - editor. Publisher: Ronald Press. Place of Publication: New York. Publication Year: 1956. Page Number: 47.
    
This feature allows you to create and manage separate folders for your different research projects. To view markups for a different project, make that project your current project.
This feature allows you to save a link to the publication you are reading or view all the publications you have put on your bookshelf.
This feature allows you to save a link to the page you are reading, which you can later return to from Projects.
This feature allows you to highlight words or phrases on the publication page you are reading.
This feature allows you to save a note you write on the publication page you are reading.
This feature allows you to create a citation to the page you are reading that you can paste into your paper. Highlight a passage to include that passage as a quotation.
This feature allows you to save a reference to a publication you are reading for your bibliography or generate a bibliography you can paste into your paper.
This feature allows you to print the page you are reading, including your notes or highlights (IE users must have "print background colors and image" setting selected.)
This feature allows you to look up words in encyclopedia.
  About Questia Tools
Close Window  
Questia's powerful research tools allow you to highlight, take notes, bookmark and even create instant citations and bibliographies. To use these features and save hours of work, you must create a Questia account.
Need a Questia account?
Sign up for a FREE trial now. Save time, stress and hassle, and get better grades with trusted, online research.

» Click here for our free trial

Already have a Questia account? Login now!
Error
Working...
Printing Preferences
Format for black and white printer: On Off
Print highlights: On Off
Print notes: On Off
Choose one of the options for printing:
Print this page (No Charge)
Print pages to