Table 2.

Proportion of cows remaining in the herd that were culled under each criterion by each age

Criteriona	Culled					Not culled
	2 yr	3 yr	4 yr	5 yr	6 yr
1	N/A	0.06	0.06	0.05	0.03	0.81
2	0.23	0.20	0.07	0.05	0.06	0.39
3	0.17	0.18	0.06	0.03	0.04	0.52
4	0.07	0.07	0.04	0.05	0.04	0.73
5	0.11	0.07	0.04	0.05	0.04	0.69

^a1 = 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 instance of failing to wean a calf, provided that they had no prior instances of calving failure, through 6 yr.