BLOOMINGTON, Ill. — A trio of tools that fit into managing nutrient loss were featured at the recent Midwest Ag Industries Exposition.

One such product, SuperU, was included in four years of field trials conducted by the University of Illinois at 15 locations. The research looked at 19 different combinations of nitrogen form and timing.

SuperU broadcast resulted in an average corn yield of 229 bushels per acre to lead the other nitrogen forms applied.

“SuperU over that whole four-year window was the number one ranked treatment among all treatments in that study. It was the highest yielding,” said Tim Laatsch, Koch Agronomic Service technical agronomy manager.

“We’re pretty excited with that because that was a not a study that we funded. It was a publicly-funded study.”

With the highest concentration of nitrogen available in a stabilized, urea-based granule, SuperU contains dual active ingredients of urease and nitrification inhibitors to guard crops from denitrification, leaching and volatilization.

“We manufacture it in our Enid, Oklahoma, nitrogen plant, and so those ingredients are integrated to the granule as the granule itself is being made, rather than being coated on the top, which enables us to push up the concentrations of active ingredients to the point that they’re truly efficacious in the agronomic cropping system,” Laatsch said.


Centuro, a next generation nitrification inhibitor for anhydrous ammonia, was added to the Koch portfolio when it received U.S. Environmental Protection Agency registration about a year ago.

“It’s the first nitrification inhibitor registered as a pesticide with EPA in over 40 years. So, we have a truly legitimate product coming to the marketplace designed for both anhydrous and UAN,” Laatsch said.

“It blocks the ammonia monooxygenase enzyme in the soil and holds nitrogen in the ammonium state three times longer before it converts to nitrate.

“That’s important from a 4R nutrient stewardship standpoint because if we’re holding it back as ammonium we’re not allowing it to convert to nitrate until later in the cropping season when the plant really needs it. We’re less prone to losing it by leaching and denitrification.”

Three years of Centuro field trials were conducted by the University of Nebraska and University of Missouri. Laatsch said Koch also worked with the Illinois Fertilizer and Chemical Association to evaluate both fall and spring applications of anhydrous ammonia with and without Centuro.

The trials found Centuro increased corn yield by six bushels per acre with fall-applied ammonia and by six bushels with spring-applied ammonia compared to untreated ammonia.

“So, we’re seeing a spring response to the nitrogen stabilizer, as well. We tested in that 2016-2018 window. Those were fairly wet springs and so you would expect a lot of below ground loss and basically it’s telling us that Centuro is doing the job that it’s designed to do,” Laatsch said.


A third product, Anvol, a urease inhibitor, received EPA registration this past January.

Anvol nitrogen stabilizer features a patented active ingredient, Duromide, and provides the longest-lasting urease inhibitor protection over a wider range of soil environments, according to Koch Agronomic Services.

“Everyone knows Koch for being the Agrotain people. This is brand new chemistry that we’re bringing to market that performs at a level higher than Agrotain. It’s about a 27% improvement over Agrotain in terms of the window of protection that you get from the product on ether urea or UAN that’s surface-applied,” Laatsch said.

Tom C. Doran can be reached at 815-780-7894 or Follow him on Twitter at: @AgNews_Doran.


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