Table 1.

Description of culling criteria

Criterion	Description
1	Cows were removed from the herd upon their second incidence of failure to wean a calf, regardless of reason, through 6 yr
2	Cows were scored as culled upon their first failure to wean a calf, regardless of reason, through 6 yr
3	Cows were scored as culled upon their first failure to give birth to a calf, through 6 yr
4	Cows were scored as culled upon their first incidence of failure to wean a calf, but not considering calving failure as a reason, through 6 yr
5	Cows were scored as culled upon their first incidence of failure to wean a calf, provided that they had never previously experienced calving failure, through 6 yr