In the State Parliament's budget sitting this week, the LNP seized on budget projections indicating that the Bligh Labor government was set to slug landholders with a new tax to pay for the SCL program.

LNP Shadow Minister for Agriculture, Food and Regional Queensland Andrew Cripps said the budget's service delivery statement contained reference to SCL 'user fees'.

"The Bligh Labor Government says it spent $800,000 developing its SCL policy.

"It has budgeted to spend $750,000 next financial year implementing the legislation and says that money will be generated by user charges," Mr Cripps said.

"But the budget doesn't forecast any revenue coming from the user charges in any financial year in the forward estimates, meaning the roll-out of the SCL legislation is an unfunded commitment - a budget black hole."

Mr Cripps called on Treasurer Andrew Fraser and Environment and Resource Management Minister Kate Jones to rule out any new tax on landowners.

"The Bligh Labor Government has promoted its SCL legislation as an initiative to identify, protect and conserve the state's best agricultural land. Now, buried in the budget papers, we find landowners could be screwed for more money," Mr Cripps said.

"I'll bet this is the first time landowners and industry groups, who have called for the implementation of this SCL legislation, have heard about user fees for protecting their prime agricultural soils."