"The forecast average lamb price of $85 per head is down 25 per cent from last season's $113.60, which was the second highest on record," he said.
"This has, understandably, flowed through to farmers' bottom lines, with the result that profit levels will effectively halve for the season ending 30 September 2013. In inflation-adjusted terms, this returned profits to levels similar to the first decade of this century," he said.
Davison said maintaining prices for lamb will be challenging.
"Europe's debt crisis is far from being solved and there is almost no growth in the region," he said.
There were concerns about economic prospects for the US, given its fiscal challenges. And China's economic growth has slowed to the lowest rate in a decade.
Cattle returns are predicted to drop 8.8 per cent, but Davison said the outlook was relatively positive, thanks to the supply situation in the United States.
Three years of drought in the US has reduced the country's total cattle numbers to 89.3 million head - the lowest tally since 1952.
Significantly, the US beef cow herd is the smallest it has been in decades and it will take years to rebuild breeding numbers, Davison said.