Doug Landblom, NDSU Dickinson Research Extension Center beef cattle specialist, shows data on calving date successes from the Cow Herd Appraisal Performance Software (CHAPS) program that some cow/calf producers in the region utilize.

This averages calving data from producers in the CHAPS program calving in March/April, as well as average calving data from producers in the CHAPS program calving in May/June.

With March/April calving:

Bull turnout averages June 1.

Average calving date is March 15.

Start of the third trimester averages Dec. 12.

Weaning age averages 205.

Weaning date averages Nov. 9.

Calf weaning weight averages 598 pounds.

Adjusted average 205-day weight is 640 pounds.

Percentage of cows calving averages 98.5 percent.

Percentage of calf death loss averages 6.5 percent.

Percentage of cows weaning calves averages 92 percent.

With May/June calving:

Bull turnout averages Aug. 1.

Average calving date is May 25.

Start of the third trimester, a critical period, averages Feb. 12.

Weaning age averages 205.

Weaning date averages Dec. 16.

Calf weaning weight averages 599 pounds.

Adjusted average 205-day weight is 639 pounds.

Percentage of cows calving averages 97.4 percent.

Percentage of calf death loss averages 3.7 percent.

Percentage of cows weaning calves averages 94 percent.

“With a May/June calving date, there is less calf death, and that is critical. It is easier calving out on pastures and grass,” he said.