Massachusetts 

 agricultural experiment station 



Bulletin No. 359 May, 1939 



Factors Affecting Fertility 

 in Rhode Island Reds 



By F. A. Hays and Ruby Sanborn 



High fertility is a basic quality in a satisfactory breeding flock. This report 

 includes results obtained over a fifteen-year period with large numbers of birds 

 used in breeding for high egg production. Attention is given to the effects of 

 a number of controllable breeding practices as well as to evidence regarding 

 the inheritance of fertility. 



MASSACHUSETTS STATE COLLEGE 

 AMHERST, mass; 



