Several experiments were conducted with birds differing in body weight, conformation and sternal measurements to obtain information on whether it would be possible during short term selection to influence the shape of the sternum and, if so, what influence this would have on the amount and distribution of the breast...
The broiler industry in the United States has undergone tremendous change since the end of World War II. Several structural
changes in the industry facilitated the widespread adoption of new
technology. Improvements in feeding, breeding, and managing made
production more efficient. Extensive use of contract growing and
production financing accompanied...
Published January 1973. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Two studies were undertaken to evaluate the effects
of nutrition and management factors on foot pad dermatitis
in single-comb White Leghorn dwarf and normal-sized
layers. In the nutrition study, caged layers were fed
one of six different diets. These included three diets
with different combinations of the trace minerals
cobalt,...
Semen characteristics and egg production of male and female
commercial broiler breeders maintained in cages or on litter floors
were evaluated over a 24-week period. Semen was collected from males
caged singly or in pairs on a schedule of 3, 5, and 10 times (3X, 5X,
and 10X) weekly from...
Three experiments were conducted to determine the influence
of supplementary biotin and of other nutrients on dermatitis and
hatchability in both normal-size and dwarf Single Comb White Leghorn
layers.
Experiment One was divided into two parts. First, preliminary
hatchability studies were conducted with both types of layers fed
the rations...
The Oregon State University Production Line of Single
Comb White Leghorns was under selection for increased henhoused
egg production from 1947 through 1972. Since henhoused
egg production is directly related to mortality,
mortality would be expected to decrease over the years if
selection was effective. To determine if the mortality...