REVIEW 291 



and to bring about steady improvement, constant thought is 

 necessary. One cannot expect to get maximum results or superi- 

 ority in his flock Without more or less continuous care in selection 

 and mating. 



REVIEW. 



1. What is the chief object in managing breeding stock? 



2. Discuss the desirability of selected matings for breeding purposes. 



3. Discuss six points which should be considered in selecting breeding birds. 



4. What is the most desirable age for breeding stock? 



5. Give five disadvantages resulting from using pullets as breeders. 



6. Discuss conditions regulating the number of males and females in the 



breeding pen. 



7. Give three features which require special consideration during the mating 



season. 



8. What four special points should be considered in feeding breeders? 



9. What points do you consider of special significance in collecting eggs for 



hatching? 



10. What points should be considered when selecting hatching eggs? 



11. Mention three factors which affect the keeping quality of hatching eggs. 



12. Give nine causes which tend to produce infertility. 



13. Mention four causes of apparent infertility or early death of the embryo. 



14. What five points are of special significance in the care of young breeders 



until maturity? 



15. Compare the wild bird and the domesticated species in reference to re- 



production and artificial breeding. 



Reference. Fertility of Eggs, North Dakota Farmers' Bulletin 251. 



