#### Son of Butch

##### Well-known member

One herd split into 2 mature cow weight groups.

group A 1295 lbs

group B 1522 lbs

group A finished steers feedlot report

finished weight 1456#

hot carcass weight 851#

group B

Finished weight 1751#

hot carcass weight 1050#

The heavier carcasses have larger rib eyes, less 12th rib fat and lower marbling scores.

The lighter cow group produced steers with higher marbling and larger rib eyes per 100 lbs of body weight.

Results from a separate cow/calf stocking rate NDSU study on grassland estimated to support 50,000 lbs of cow/calf.

47 - 1100# cows - produce 47 calves weighing 535 lbs at 7 months = 25,145#

39 - 1400# cows - produce 39 calves weighing 639 lbs at 7 months = 24,921#

total 224 lbs more from the smaller cows

Combining the data from the 2 studies the expected finished carcass weights:

47 - 1100# cows will produce 34,640# of finished carcasses

39 - 1400# cows will produce 36,540#

total 1,900 lbs more from the larger cows