The expected long ride with high corn prices may be shorter than most are forecasting and the fall may be more severe, says veteran commodity market analyst Richard Brock.

The bottom line, he says, is sell all of last year’s corn, most of this year’s corn and some 2013 corn. He also suggests holding beans to wait for the price to settle in the $13.25-$13.50 range.

Brock, who is one of the country’s most sought after farm commodity consultants, says several key economic indicators lead him to believe what has been a big bull market for corn will turn into a long-running bear market.

Speaking at the recent annual meeting of the Virginia Grain Growers Association, Brock admits some of his peers think he is over-reacting to economic indicators and too quick to pull the plug on high corn prices.

Talk aside, the one-time Indiana farm boy is putting his beliefs in action.

“We have sold all our 2011 corn and 70 percent of our 2012 corn. Plus, we have already sold 30 percent of our 2013 corn,” Brocks says, stressing his belief that corn is facing a protracted battle to push prices back up.

Brock lists several factors that have factored into his appraisal of the corn market.

The trend line for corn yields in the U.S. has gone upward over the past 30 years. During that timeframe there have been a few one-year drops in average yield and only one two-year drop — 2010 and 2011.

These drops are directly related to drought and flooding in the U.S. corn belt. While it is possible to have a third consecutive slowdown in corn yields, Brock says that’s not likely, pointing out it has never happened over the past 30-40 years.

“The meteorologist we use to help make weather-related crop pricing forecasts has been more accurate than most. He says there should be an end to the two-year La Niña weather pattern that has slowed the growth of corn yields over the past two years. And, our weather man contends there should be plenty of moisture to get corn up and growing this spring,” Brock says.