IMPROVEMENT OF VARIETIES 93 



References on methods of continuous pedigree selection : — 

 111. Exp. Sta., Buls. 74, 82, 100, 128. 

 Conn. Exp. Sta., Buls. 152 and 168. 

 Ohio Exp. Sta., Circ. 66. 

 Nebr. Exp. Sta., Bui. 112. 



Directions to Cooperative Corn Breeders. Hartley, C. P. 

 (1910.) Bur. of Plant Industry, Wash., D.C. 



