268 AGRICULTURE. 



true. But the work of selecting the best seeds 

 from the most uniform and typical plants must 

 never be neglected, or the plants will in time 

 revert to degenerate types. 



If inbreeding is not possible, the variety may 

 be perpetuated by bud propagation where prac- 

 ticable ; indeed, in many cases it is the possi- 

 bility of propagating by buds that makes the 

 crossing of plants profitable.* 



C REFERENCES. 



"Progress in Plant and Animal Breeding." Year-book, 1901. 

 United States Department of Agriculture. 



" Progress of Plant Breeding in the United States." Year- 

 book. 1899. 



"Hybrids and Their Utilization in Plant Breeding," Year- 

 book, 1897. 



" Influence of Environment in the Origination of Plant Varie- 

 ties." Year-book, 1896. 



"Improvement of Corn by Seed Selection." Year-book, 1902. 



"Pollination of Pomaceous Fruits." Year-book, 1898. 



" Improvement of Plants by Selection." Year-book, 1898. 



"The Improvement of Our Native Fruits." Year-book, 1896. 



" Every Farm an Experiment Station." Year-book, 1897. 



" Improvement of Corn by Seed Selection." Missouri Agri- 

 cultural Experiment Station. 



"The A. B.C. of Corn Culture." P. G. Holden. n. 



" Plant Breeding." Bailey, 1897. 10. 



" Principles of Plant Culture." Goff, 1899. Published by 

 author. 



"Self-Origination of Species and Cross-Fertilization." Dar- 

 w'n. 9. 



Variations of Animals and Plants Under Domestication. 

 Darwin. 9. 



" Origin of Cultivated Plants." De Candolle. i. 



* Bailey's Plant-Breeding, p. 51. 



