A series of 8 experiments was conducted to investigate various
methods of delaying the sexual maturity of developing White Leghorn
(W. L.) pullets grown during a period of increasing day length and to
control the feed intake of W. L. layers. In the first five experiments
W. L. pullets were...
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...
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,...
The records of a population of sex-linked dwarf layers
at the Oregon State Agricultural Experiment Station subjected
to an accelerated selection for hen-housed egg production at
40 weeks of age for a period of over 11 years were analyzed
for selection response, and for the estimation of genetic
parameters. The...
Published July 1936. 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
Three studies were designed to evaluate the promoting
effect of cyclopropenoid fatty acids (CPFA) on avian myeloblastosis
virus (AMV) infection in White Leghorn chickens.
In the first study effects on growth parameters, blood serum
and erythrocyte lipid composition of White Leghorn chickens
were investigated at 100 ppm and 300 ppm...
Two experiments were conducted each with 768 Deka lb XL Single Comb
White Leghorn (SCWL) laying pullets for nine and eight 28-day periods to evaluate
the feeding value of yellow pea (YP) (Pisum sativum L. var. Miranda) without and
with, respectively, either 1.5 or 5% meat and bone meal (MB)...
The records of a population of White Leghorns at the Oregon
State Agricultural Experiment Station, submitted to accelerated
selection for hen-housed egg production on an individual and a family
basis at 40 weeks of age for 18 years, were studied. An analysis
was made to determine the relative efficiency of...