With high global commodity prices driving demand for new machinery and with new markets emerging overseas, Case IH says its has already sold out of combines for the 2008/09 season.

And Mr Rendell forecasts the stock shortage may continue into next year as the outlook is for consistent strong commodity prices.

"With the market so robust, demand for our combines is at unprecedented highs," Mr Rendell said.

"If you are considering a new-model Case IH Axial-Flow combine for the 2009 harvest, we recommend you talk to your Case IH dealer as soon as possible."

Forward-thinking farmers who order a new-model Axial-Flow combine before July 31 will get the additional benefit of a 0.4pc reduction on the interest rate if they finance the purchase through Case Credit.

"And they’ll also be able to lock in pricing. With steel prices on the rise at the moment it's possible machinery prices will be lifted for next season – locking in now means avoiding the rise," Mr Rendell said.

Case IH has been refining its industry-leading Axial-Flow technology for over 30 years.

As with every previous design, the new models are based around the six core principles of simplicity, grain quality, grain savings, adaptability, matched capacity and excellent resale value.

Case IH has not yet publicly released full details about the features of the new models.

Farmers should contact their local dealer to talk about their requirements and plan forward orders.