192 INTRODUCTION TO BOTANY 



COLLATERAL READING 



The names Yearbook, Farmers' Bulletin, Bulletin . . ., Bureau of Plant 

 Industry, as used in the list given below, all refer to the publications of 

 the United States Department of Agriculture. 



A very detailed list of books and articles on plant breeding will be 

 found in Bailey, Plant Breeding. The Macmillan Company, New York. 

 Some titles not already referred to in this chapter are as follows : 1 



GENERAL 



Yearbook, 1898, " The Improvement of Plants by Selection." 

 Yearbook, 1906, " The Art of Seed Selection and Breeding." 

 Farmers' Bulletin 334, " Plant Breeding on the Farm." 

 Bulletin 167, Bureau of Plant Industry, "New Methods of Plant 



Breeding." 

 Cyclopaedia of American Horticulture, article " Plant Breeding." The 



Macmillan Company, New York. 

 Cyclopaedia of American Agriculture, article " Plant Breeding." The 



Macmillan Company, New York. 

 Davenport, The Principles of Breeding. Ginn and Company, Boston. 



SPECIAL 



Farmers' Bulletin 229, " Production of Good Seed Corn." 

 Yearbook, 1906, " Corn-Breeding Work at the Experiment Stations." 

 Yearbook, 1902, " Improvement of Cotton by Seed Selection." 

 Farmers' Bulletin 342, " Potato Breeding." 



PROBLEMS 



1. In which kind of plants annual, biennial, or perennial can 

 plant-breeding results be most rapidly attained ? Why ? 



2. In what kind of plants those propagated by seeds or those 

 propagated by vegetative means are the results of plant breeding- 

 most readily perpetuated? 



3. If you were asked to originate a new variety of string beans, 

 how would you go to work ? 



4. Is plant breeding easier with plants that have many well-defined 

 and permanent varieties or with those that have no such varieties? 

 Illustrate. 



1 The number of valuable bulletins published by the agricultural experi- 

 ment stations of the several states is so great that no attempt is here made 

 to cite them. 



