Table 3 Baseline beef cattle performance parameters

Age at first calving (mo)^a

40.0

Calving interval (mo)^a

16.0

Live calves born per cow per year^b

0.53

Calves destined as heifer replacements^c

0.14

Calves destined as beef cattle^d

0.37

Age at weaning (mo)^a

8.0

Finished cattle age at slaughter (mo)^a

36.0

Finished cattle weight at slaughter (kg)^a

530

Finished cattle carcass weight (kg)^a

281

Proportion of cows in the population^a

0.26

Proportion of replacement heifers in the population^a

0.14

Proportion of bulls in the population^a

0.04

Proportion of growing cattle in the population^a

0.56

Proportion of replacement heifers born that enter herd^a

0.90

Replacement rate (%)^a

12.5

Calf and growing cattle mortality (%)^a

5.0

Potential prime beef lost per cow death (kg CW)^e

345

Cull cow beef lost per cow death (kg CW)^f

214

GHGe per kg CW beef (kg CO₂eq)^g

73.0

Annual GHGe per beef cow in the herd (kg CO₂eq)^h

7997

Proportion of GHGe attributed to herd maintenance^a

0.52

Proportion of GHGe attributed to cattle growth^a

0.48