A BOOST in assistance to Queensland primary producers and businesses hit by flood damage has been announced.

Concessional interest-rate loans of up to $650,000, with grants of up to $50,000, will be made available to primary producers and businesses that suffered extreme damage as a result of ex-Tropical Cyclone Oswald.

These arrangements will be equally funded by both the Queensland and Federal governments.

The assistance is similar to the loans that were provided after the 2011 floods and Tropical Cyclone Yasi.

The first two years will be interest free, with no repayments required.

These extra loans and grants are being made available to eligible primary producers and businesses in 14 local government areas, from Bundaberg shire in the north to Scenic Rim in the south.

This extra assistance is being provided through Natural Disaster Relief and Recovery Arrangements, and will be delivered through the flood-impacted areas by QRAA.

Queensland Treasurer Tim Nicholls said the Newman Government was committed to working with the Federal Government to secure further assistance for storm and flood affected areas.

"The Newman Government will continue to work with the Commonwealth to secure further Category D assistance to help the worst affected areas get back on track after ex-Tropical Cyclone Oswald,'' Mr Nicholls said.

"These substantial loans will allow primary producers and businesses to get on with the job of rebuilding following this disaster.''

Queensland peak horticultural body Growcom has been calling for Category D assistance since the floods struck.

"Growcom is pleased that governments are listening to industry bodies and are taking seriously the detailed supporting data we have provided to justify Natural Disaster Relief and Recovery Arrangements (NDRRA) support,'' chief executive Alex Livingstone said.