Least squares means were
compared among regions and herd size categories (signEighteen performance variables were analyzed. Production
variables were rolling herd average (RHA) milk
(kg/cow per year), RHA fat (kg/cow per year), RHA protein
(kg/cow per year), summit milk (kg), and standard level is closely related to management factors (Norell
and Appleman, 1981; Pelissier, 1968; Van Horn and
Wilcox, 1992).
Figure