The Queensland Farmers Federation (QFF) says it is worried about fewer younger farmers coming into the state's rural industries.
New data from the Australian Bureau of Statistics shows the farm workforce is ageing, with a median age of 53 for farmers in 2011, compared with 40 for other occupations.
QFF spokesman Dan Galligan says the lack of young farmers is a bigger problem and will make it hard for the sector to expand in the coming decades.
"Almost 30 per cent of farmers in the last survey were below 35 years of age and we've gone down to 13 per cent at both ends of the spectrum," he said.
"The average farmer is getting older and we're actually not encouraging young farmers ...
that to me is probably the biggest warning bell in this whole survey.
"There's huge potential for the sector ahead, but not if we don't have farmers coming into the sector." He says better policies are needed to encourage young people into farming, otherwise agriculture will not capitalise on its potential.
"We need to work with governments and we need to work with communities to encourage people and find ways for people to access the capital that's required to get into farming, and to access it in a way that doesn't require such huge up-front costs.
"That's really the challenge - it's the huge amount of money that's required to buy into a farm," he said.