82 PRACTICAL CORN CULTURE 



"Soy Beans." By Piper and Nielson. U. S. Farmers' Bul- 

 letin, No. 372. 



"The Culture of Soy Beans." By Leonard Hegnauer. Il- 

 linois State Register, June 30, 1913. 



"Cowpeas. " By Griffith. Fruit Grower and Farmer. May, 

 1913. 



"The Vetch Book." By William C. Smith. 



"Vetches." By Piper and McKee. U. S. Farmers' Bulle- 

 tin, No. 515. 



"A Great Alfalfa Campaign." The Breeders' Gazette. May 



21, 1913. 



"Alfalfa." By Peter C. Swartz. Farmers' Review. Feb. 



22, 1913. 



"Seeding Alfalfa." By Rupert L. Stewart. Weekly Star. 



Jan. 21, 1913. 

 "Alfalfa on Illinois Soil." By Cyril G. Hopkins. Bulletin 



No. 26, 111. Agri. Ex. Sta. 

 "Sweet Clover." By Alson Secor. Successful Farming, 



October, 1913. 



