During years 2005, 2006, and 2007 ewes of predominantly Polypay breeding
were bred to either Dorper or Polypay rams for spring lambing. Ewes were assigned to
single-sire mating groups based on age and genotype. Interna ...
In the majority of management scenarios, it is imperative that beef replacement heifers calve at two years of age. In order to achieve this goal, yearling heifers should reach 60 to 65% of their mature body weight by 13 ...
