Red Brahman x Droughtmaster cattle on Balfour Downs
DETERMINING how many bulls are needed to achieve target conception rates is often the result of anecdotal advice or local practice.
It’s not uncommon to hear producers refer to needing to run bulls at three percent of cow numbers in temperate areas and in northern and extensive areas some say with ‘absolute conviction’ that bulls must be run at 5-6 percent of cows.
This common approach is described by Dr Geoffry Fordyce as ‘traditional opinions’ that are without evidence-based science. In research conducted earlier by Dr…
