The two other models were comparable in all terms except they added a predictive variable to take into account the effect of calving date.
Effects of precalving feed level on birth weight, calving difficulty and subsequent fertility.
Several studies showed a negative correlation of the postpartum anoestrus with the calving date on suckler herds in both the northern and southern hemisphere.
One exception was a milk sample from a heifer at calving, which yielded two morphologically distinct colony types and two strains.
The event of calving appeared to reduce the likelihood of shedding.
Samples were missing at calving for 32 quarters.
Because of a lack of available quantitative data relative to the combined effect of bull stimulation and body condition at calving, this expression was calibrated.
An indicator of length of calving season was measured by the date by which approximately 75 % of calves were born.
