Growing an acre of corn, soybeans or wheat in 2012 will cost producers a lot more than it did this year, says a Purdue Extension agricultural economist.

Farmland rental costs and volatile fertilizer prices are the two primary drivers of increasing costs, and, according to Alan Miller, seed prices also will be up 5 percent to 10 percent in the coming year. Pesticide prices will vary by product.

"Preliminary budgets show variable costs for rotation corn increasing by 16 percent, soybeans by 15 percent and wheat by 12 percent as compared with our January 2011 budgets," Miller said.

Estimates show that despite a recent decline in corn and soybean prices, the income potential from continuous corn on average-yield ground is higher relative to rotation soybeans than in most years. Miller said the income potential may be even better for continuous corn on Indiana's best farm ground.

"The markets are still signaling that they want more corn in 2012, so the question is whether farmers will listen," he said. "There probably will be more corn next year."

Even with input costs up in 2012, Miller said farmers can begin to manage their profit margins now, such as by pricing fertilizer for 2012. Fertilizer prices are lower this fall than they are expected to be next spring.

Another area Miller said growers should be looking at is cash rents.

"It's hard to figure out a fair amount of cash rent, especially in an environment with so much potential for quick commodity price declines and input price surges," he said. "We don't want to see another 2009 where grain prices dropped, costs increased and profitability disappeared. It's a challenging risk management environment for the farmers."

He urged farmers to be cautious and to try to hold down costs by thinking through all of their purchases.

"Commodity producers need to still be working on being low-cost producers on a cost-per-bushel-produced basis," Miller said. "Growers need to manage the expected margin between the selling price of the corn and their costs. Try to market to lock in commodity prices and to lock in prices on purchased inputs. Lock in profit margins and don't give up marketing strategies."