Corn

Selling U.S. corn just by weight without taking into consideration the difference in livestock performance result of germplasm improvements puts U.S. corn at a trade disadvantage. 

Editor’s note: The following was written by Alvaro Garcia, South Dakota State University Extension Agriculture and Natural Resources Program Director, for the university’s Extension website.


Corn grain has been the world standard when it comes to energy feeds for livestock. It has been traditionally a quite homogeneous, energy-dense feed, only surpassed from this perspective by oils and fats or by other feedstuffs also rich in lipids.

The history of heavy grain feeding to fatten cattle started in the U.S. at the turn of the 19th century in the Ohio Valley region. Corn production continued to rise, leading to an oversupply that drove prices down, until the depression era in the 20th century when the U.S. government began to regulate production.

It was the government of Franklin D. Roosevelt that paid subsidies to farmers so they would not plant any more corn. This regulation operated through the early 1970s, when a large corn sale to Russia, combined with a bad U.S. crop season, made prices soar during the summer of 1973.

Higher prices for the grain dragged with them nearly all the food chain, creating a shortage of animal proteins among other foods. As a result, the U.S. government at the time changed the support for corn (Agricultural and Consumer Protection Act of 1973), guaranteeing farmers a price through direct payments for every bushel produced. During 1974, corn prices tripled compared to just 4 years before.

Early into the 21st century (2005) the Energy Policy Act required more ethanol to be used as a bio-fuel; later on, in 2007, the U.S. government proposed a 20% reduction on the dependence of oil by 2017. Today, nearly 35% of the corn crop goes to ethanol, and farmers have responded by increasing corn production even more.

In spite of all these stimulus packages, it would be simplistic to blame government-supported programs for today’s oversupply of corn. Yes, farmers have been encouraged to plant corn as a result of those “subsidies.” However, if we look at the acres planted vs. the bushels per harvested acre, the real culprit has been technology.

We are planting nearly the same acres as in the Second World War. We do not live in a world of “100-bushel corn” anymore, however, but rather are encroaching the 200-bushel average.

Add the recent trade/tariffs issues, and we can clearly understand why U.S. corn prices are dismal. Modern technology and hybrids, coupled with worldwide access to information through the era of communications, have benefited not only U.S. farmers but also those in the rest of the world. Today’s competition is wild and we need to find ways to “level the playing field.”

Future of corn marketing

Barrels, bushels, metric tons, short tons, long tons. We are in the 21st century, and for as long as anyone can remember we are selling grain by weight and/or volume.

The best we have come up to is a combination of both to obtain specific weight, at least for certain grains. That is pretty much it, with no mention whatsoever about nutrient content as it relates to livestock performance.

Everyone can relate to different gas pump prices. All blends are gasoline, however their price differs depending on the performance expected from the vehicle. This is key to understand why we need to differentiate U.S. corn from that of other origins.

Modern selected livestock breeds can outperform older genetics, provided they receive adequate “fuel.”

Corn grain has also changed with the development of new hybrids, which yield more bushels per acre and more nutrients per bushel. This is particularly true in the U.S. and more so during the present century. The proposed reduction on the dependence on foreign oil together with the Energy Policy Act of 2005 led to the selection of corn hybrids that yield more starch and oil.

Back in the early 1970s feed brokers/buyers as well as animal nutritionists operated under certain nutrient content assumptions for corn. The grain was sold as an energy feed with a very homogeneous nutrient concentration across markets with approximately 9-10% protein, 60% starch and 3% oil. This corn was sold at the time on a per ton basis.

Modern U.S. corn differs and contains 8-9% protein, 73% starch, and almost 4% oil. This modern U.S. corn is still sold today on a per ton basis.

Some international brokers and even buyers still use the protein content in corn as a sales pitch, whereas very seldom stress the almost 22% increase in starch or oil over the years. Furthermore, what is truly important is not only the starch concentration per se, but how digestible it is, which is determined by its concentration of the prolamin “zein.”

Nutrient content of modern U.S. corn

Each year the U.S. Grains Council publishes a very thorough report of the corn crop. For the 2017-18 harvest, the target population was yellow commodity corn from 12 key U.S. corn-producing states representing approximately 93.1% of U.S. corn exports.

As stated above, modern U.S. corn averages less than 9% protein, almost 73% starch and close to 4% oil. This has been the result of decades of selection for corn with higher content of energy yielding nutrients.

Aside from strictly the nutrient content, there is an urgent need to also assess what proportion of those nutrients (particularly starch) are turned into energy by livestock. Selling U.S. corn just by weight without taking into consideration the difference in livestock performance result of germplasm improvements puts U.S. corn at a trade disadvantage.

If U.S. corn is going to be able to compete with that from other origins (i.e. Argentina, Brazil, Black Sea region), there is a need to stress its unique composition compared to that of other world regions.

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