TY - JOUR AU - Asmundson, V. S. TI - Selection and management of turkey breeding stock are subjected to studies JF - California Agriculture JO - Calif Agr Y1 - 1947/02/01 VL - 1 IS - 3 SP - 4 EP - 4 PB - University of California Agriculture and Nature Resources SN - 0008-0845 UR - http://www.ucanr.edu/sites/calagjournal/archive/?article=ca.v001n03p4a AB - One of the simplest ways of increasing egg production of turkey breeder hens has been the use of artificial lights. This is effective provided the day is long enough—about 14 hours—and the light bright enough, about two foot-candles at the place where the birds are exposed to the light.