It's harvest time on the Great Plains, and a new study shows how energy prices and the demand for biofuels are affecting the nation's breadbasket.

The study by researchers at Colorado State University (CSU) and the University of Michigan (UM) reveals that, although Great Plains ag production, population and income trends have been surprisingly stable during the past 100 years, the recent rise of energy prices offers challenges and opportunities for this region's future.

Published in the October 2007 issue of BioScience, the study examines whether it's possible, in the long term, to maintain ag-orientated populations in the Great Plains region as well as in similar regions around the world.

"Great Plains ag production has increased, while rural populations and ag income have remained stable during the last 40 years. These trends are a result of large increases in irrigated ag, livestock production and federal farm payments," says William Parton, senior research scientist at CSU's Natural Resource Ecology Lab.

The study shows the region isn't homogeneous, with different experiences in three broad categories of counties: those with metro cities, those with rural populations and irrigated ag, and those with rural populations but without irrigated ag. Metro counties grew rapidly in the Great Plains during the past 75 years, just as they have elsewhere in the U.S.

"Our key findings apply to rural ag areas," says Myron Gutmann, director of the Inter-University Consortium for Political and Social Research and UM professor of history. "Rural areas with irrigation have done surprisingly well, sustained by increases in production of crops and livestock. Their ability to produce large quantities of corn gives them great potential because demand for biofuels has doubled the price of corn. Even though rural areas without irrigation lost population prior to 1970, their populations, ag production and incomes have kept up fairly well since then."

Despite long-term stability and positive future potential, price increases of the past three years create uncertainty about the sustainability of recent trends. Growing demand for grain can increase profits for farmers and produce work that will add to population. At the same time, Great Plains ag uses large amounts of energy for irrigation and equipment, and energy prices drive up the cost of fertilizer. It's not yet possible to see how well farmers, their employees and their neighbors will do in the changing environment of rising prices for the energy they consume and the food and fiber they produce.

This study of sustained trends indicates that many of the potential threats to the Great Plains that have worried the local population, scientists and policy makers in the past are less significant in a long-term context than those threats may have appeared at one moment or another. Nevertheless, the region's reliance on ag, the variability of weather and the ever-changing demands of the market means nothing is ever settled for long and that changes are always just around the corner.

For more info, visit www.icpsr.umich.edu/PLAINS/.
-- Colorado State University release