Litter site and birth weight data compiled from the
farrowing records of 275 litters out of 109 purebred
Berkshire sows of the Oregon State University swine herd
during the years 1953 to 1960 inclusive were used in this
study. Genetic and environmental factors influencing
four components of reproductive performance, namely,...
Growth data compiled in this study were collected by using
pigs farrowed during the fall, 1963 and spring, 1964 farrowing seasons
of the Oregon State University swine herd. Thirty-seven trios
of light-, medium- and heavy-birth-weight suckling pigs were used to
determine the effect of birth weight on subsequent rate of...
Progeny from three sires of differing genetic background were
divided within litters by sex and placed on either a 15 or 19% protein
ration. The test period began when the experimental animals weighed
60 pounds and continued until they were slaughtered at 225 pounds.
This test period was divided into...