Breeding
Kempster, H. L.; Kempster H. L.; Culling for Egg Production
Журнал:
International Review of Poultry Science
Дата:
1928
Аннотация:
The Canadian Record of Performance for Poultry. Report for Record Year 1926–1927. Ottawa, Canada.The eighth year of Record of Performance work has proven to be the most successful to date. A substantial increase occurred in the number of breeders entering flocks and in the number of birds tested. The demand for certified R.O.P. stock and its progeny increased both at home and abroad.
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